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Sleep is the one health behaviour nobody has to be persuaded to want. Almost everyone already knows they would feel better with more of it. The problem is rarely motivation. It is that sleep cannot be forced, and that most of what gets sold as a solution addresses the wrong part of the problem.

Over the last decade sleep has gone from neglected to intensely optimised. There are rings, mattresses, glasses, sprays, gummies, tapes, and protocols, and a genre of content that manages to make an ordinary night feel like a performance you are failing. Some of the underlying science behind this attention is excellent and genuinely worth knowing. Some of the advice built on top of it has drifted a long way from what the studies actually showed.

This guide goes deep, because sleep rewards understanding. We will walk through what your body is doing while you are unconscious, what shapes it, and which levers actually move the needle. We will be specific about the strength of the evidence, including where the honest answer is that something is promising but unproven. And we will spend real time on the part most guides skip: that the harder you try to sleep, the worse it usually goes, and what to do about that.

What sleep actually does

It is tempting to think of sleep as the body switching off. It is closer to the opposite. Sleep is a busy, highly organised state in which a set of jobs get done that cannot be done well while you are awake.¹ Understanding those jobs makes the rest of this guide much easier to reason about.

It files what you learned

One of the best established functions of sleep is memory consolidation. Through the night your brain replays and stabilises what you took in during the day, moving it from fragile short-term storage into more durable form.² Different stages handle different kinds of material, which is part of why both deep sleep and dreaming sleep matter rather than one being the useful one. Practically, this is why a night of studying or practising followed by real sleep beats the same hours spent awake.

It clears out waste

The brain has a drainage system, sometimes called the glymphatic system, that flushes metabolic waste using the fluid surrounding it. Landmark work in mice showed this clearance increases substantially during sleep.³ That finding is genuinely important and has driven a decade of research into sleep and long-term brain health.

It is also a good place to be careful, because it is the single most over-extrapolated fact in popular sleep content. The core mouse finding is solid. The confident human version, that a few bad nights are letting Alzheimer's proteins pile up in your head, goes well beyond what has been shown. Large observational studies do link persistently short sleep in midlife with higher later dementia risk, which is worth knowing.⁴ But observational links are not proof of cause, and a rough week is not brain damage.

It runs your hormones and repairs your body

Sleep is when much of your growth hormone is released, concentrated in the deep stages early in the night, supporting tissue repair.⁵ Cortisol follows its own daily rhythm, dipping in the evening and climbing towards morning to help you wake. Sleep also influences the hormones that govern appetite, which is one reason short sleep tends to make food harder to regulate the next day.

It supports your immune system

Sleep and immune function are tightly linked, and the relationship runs both ways: infection makes you sleepy, and sleep loss measurably weakens aspects of immune response.⁶ The everyday version of this is familiar to everyone. You get run down, and then you get ill.

It processes emotion

This may be the most underrated function. Dreaming sleep appears to help take the emotional charge out of experiences while keeping the memory of them, and sleep deprivation reliably makes people more reactive, less patient, and worse at reading others.⁷ If you have ever noticed that a problem felt unbearable at midnight and merely annoying after a good night, that is not imagination. It is one of the clearest demonstrations of what sleep does for the mind.

The shape of a night

Sleep is not one uniform state. It moves through repeating cycles of roughly ninety minutes, each containing lighter sleep, deep sleep, and dreaming sleep in changing proportions.¹ Seeing the shape of a night explains a surprising number of everyday experiences.

Deep sleep comes first

The deepest, slowest sleep is concentrated in the first few hours. This is the physically restorative portion, associated with growth hormone release and the strongest wave of brain clearance.³ It has a practical consequence: if you go to bed much later than usual but still have to get up at the same time, you lose proportionally more of your dreaming sleep than your deep sleep, because your body prioritises the deep portion first. It also explains why being woken in the first couple of hours feels so brutal. That grogginess has a name, sleep inertia, and it is worst when you are pulled out of deep sleep.⁸

Dreaming sleep comes last

Dreaming sleep, or REM, lengthens as the night goes on, so the largest share of it arrives in the final hours before waking. This matters more than people realise. Cutting your night short at the end, by an early alarm or a late bedtime, disproportionately removes the stage most involved in emotional processing and certain kinds of learning.² Two people can both sleep six hours and end up with quite different nights depending on which end they trimmed.

Waking in the night is normal

Brief awakenings between cycles are a standard feature of healthy sleep, not a fault. Most are so short you never remember them. People usually only notice them when something makes them memorable, such as anxiety about sleep or checking the time. If you wake, roll over, and drift off again, your sleep is working as designed.

Chronotypes are real, and partly fixed

Some people are genuinely wired to be alert earlier or later, and this is not a character trait or a discipline problem. Chronotype has a substantial genetic component and shifts across the lifespan, typically later during adolescence and earlier again with age.⁹ Living far out of step with your own rhythm, working early while your body wants to be late, produces what researchers call social jetlag, and it has been linked in population studies with poorer metabolic and cardiovascular markers.¹⁰¹¹

The honest nuance is that chronotype is a tendency rather than a life sentence, and it can be nudged by light exposure and consistent timing. It is also not an excuse to be permanently nocturnal if your obligations start at eight. The realistic aim is to reduce the gap between your natural rhythm and your actual schedule, rather than to win the argument with either.

How much do you need?

The familiar answer is eight hours, and it is a reasonable rule of thumb that has become a source of unnecessary anxiety. The actual recommendation from expert consensus is a range: most adults do best somewhere between seven and nine hours, with some people genuinely fine at six and others needing closer to ten.¹² Individual need is real, and it is largely not something you choose.

A very small number of people carry genetic variants that let them function well on notably less sleep without the usual costs.¹³ These variants are rare. Most people who believe they are natural short sleepers are simply used to being tired, since one of the effects of chronic sleep restriction is that your judgement of your own impairment degrades along with everything else.

What the population data consistently shows is that both very short and very long habitual sleep are associated with worse cardiovascular outcomes.¹⁴ The long-sleep end is often misread. In most cases, sleeping ten or eleven hours regularly is more likely a signal of an underlying issue, such as an untreated sleep disorder, depression, or illness, than a cause of harm in itself.

The most useful measure is not the number on a tracker. It is how you function. If you fall asleep within a reasonable window, sleep through most of the night, wake without dread, and are not fighting to stay awake during the day, your sleep is probably serving you regardless of what the app says. Needing an alarm to survive every morning, or falling asleep the moment you sit still, is more informative than any metric.

Light, the master signal

If you change one thing after reading this guide, make it your relationship with light. Your body runs an internal clock of roughly twenty four hours, and light is the dominant signal that sets it. Everything else, melatonin release, core temperature, alertness, appetite, follows from that clock being correctly anchored.

Morning light anchors the day

Daylight early in the day is the strongest available cue telling your body when morning is, which in turn determines when evening sleepiness arrives. A well-known study took people camping with only natural light and found their internal clocks shifted earlier and aligned tightly with sunrise within a week, even in people who had been night owls.¹⁵ You do not need to go camping to use this. Getting outside reasonably soon after waking, ideally for ten to thirty minutes, is a free and well-supported intervention.

This is the practice popularised most widely by Andrew Huberman, and the core of it is well founded: early daylight is genuinely one of the highest-value sleep habits available. Where the popular version outruns the evidence is in the precision. The specific timings, durations, and lux targets that circulate online are extrapolations and rules of thumb rather than established protocol, and no study has demonstrated that missing your window by twenty minutes undoes the benefit. Treat it as a robust habit, not a ritual you can fail.

An important detail that often gets lost: outdoor light on an overcast day is dramatically brighter than indoor lighting. You do not need direct sun, and you do not need a device. Stepping outside beats sitting by a window, and sitting by a window beats staying in a lit room.

Evening light delays it

Light late in the evening pushes your clock in the other direction and suppresses melatonin release, delaying sleepiness. This effect is real and has been measured directly: reading on a light-emitting device before bed lengthened the time taken to fall asleep, shifted the circadian clock, and reduced next-morning alertness compared with reading print.¹⁶

The practical response is simpler than the gadget market suggests. Dim your home in the last hour or two, favour lamps over bright overhead lighting, and be more careful about overall brightness than about any specific wavelength. We will come back to blue-light glasses in the overreach section, because the evidence for them specifically is weaker than their popularity implies.

Europe's latitude problem

Europe stretches from around thirty five degrees north in Crete and southern Spain to nearly seventy degrees in the far north of Scandinavia and Finland. That is an enormous range, and it means the same continent contains genuinely different light environments. A December morning in Seville and a December morning in Helsinki are not the same physiological situation, and advice written as though they were will fail one of them.

The further north you live, the weaker your winter light signal becomes and the more your body has to run on habit rather than cue. Research comparing sleep near the equator with sleep at Arctic latitudes has found meaningful seasonal differences in sleep timing and quality in the far north.¹⁷ Struggling to get going on a dark morning is not a personal failing anywhere in northern or central Europe. It is a predictable response to a signal that has genuinely faded.

The practical response scales with where you are. Everywhere in Europe, the anchoring habits matter more in winter than in summer: a firmly consistent wake time, getting outside during whatever daylight window exists even when it is grey, and being deliberate about bright indoor light in the morning. The further north you are, the less optional this becomes. Some people find a daylight lamp helpful in the darkest months, and while the strongest clinical evidence for light therapy is in seasonal mood and circadian rhythm disorders rather than general winter sluggishness, it is a low-risk thing to try.

Summer flips the problem, and again the severity depends on latitude. In southern Europe the issue is mostly heat, and a cool room does more than anything else. In the north, where it barely gets dark at all for weeks, the issue is light itself, and proper blackout at the window does more than anything you can take.

The daily levers

Beyond light, a handful of everyday inputs reliably shape how you sleep. None is exotic, and most of the benefit comes from getting them roughly right rather than perfectly optimised.

A consistent wake time

Of all the schedule advice, this is the piece worth protecting. Waking at a similar time every day, including weekends, stabilises your clock and makes evening sleepiness arrive predictably. It is more powerful than a consistent bedtime, because bedtime largely follows from when you woke and how much daylight you got. Sleeping in heavily on weekends is the mechanism behind social jetlag, and while catching up on lost sleep does help you feel better, weekend recovery sleep has been shown not to fully undo the metabolic effects of a week of restriction.¹⁸ Some catch-up is fine and human. A four-hour weekend swing is a different matter.

Caffeine, and its long tail

Caffeine works by blocking the signal that makes you feel sleepy, and it lingers far longer than most people assume, with a half-life of roughly five to six hours in a typical adult. In a controlled trial, a substantial dose taken six hours before bed still measurably disrupted sleep, and notably, participants did not always notice.¹⁹ That last part is the important bit. Sleeping through caffeine is not the same as sleeping well through it.

Sensitivity varies a lot between people for genetic reasons, so the right cut-off is personal. A reasonable default is to keep caffeine to the first half of your day and then adjust based on how you actually sleep. If you are a poor sleeper who drinks coffee after lunch, this is one of the highest-yield experiments available to you.

Alcohol, the convincing impostor

Alcohol is the most widely used sleep aid in Europe, and it is a genuinely poor one. It does help many people fall asleep faster, which is why the belief persists. But it fragments the second half of the night and suppresses dreaming sleep, producing exactly the shallow, unrefreshing sleep and early-hours waking that people complain about.²⁰

This is not an argument for never drinking. It is a reason to stop treating a nightcap as a solution to poor sleep, and to notice that regular evening drinking may be a cause of the problem you are trying to fix. If you drink, earlier and less is meaningfully better for sleep than later and more.

Movement

Regular physical activity improves sleep quality, and the effect is consistent across meta-analyses.²¹ It does not need to be intense, and the benefit accumulates over weeks rather than arriving the same night. The old warning against any evening exercise has softened considerably: for most people, moderate activity in the evening is fine and better than not exercising at all. Hard training very close to bedtime does keep some people wired, so if that is you, moving it earlier is worth testing.

Temperature

Falling asleep requires your core temperature to drop, and a cool room supports that.²² Most people sleep better somewhere in the region of sixteen to nineteen degrees, though preference varies. There is a neat trick here that sounds backwards: a warm bath or shower one to two hours before bed helps you fall asleep faster, because warming your skin drives heat away from your core and accelerates the drop.²³ This is one of the better-supported and cheapest interventions in the whole field.

Food, drink, and sleep

The relationship between diet and sleep runs in both directions, and the evidence is more modest than the volume of advice about it suggests. Overall dietary pattern matters more than any individual food, and reviews generally find that diets higher in fibre and lower in saturated fat and refined sugar are associated with deeper, less fragmented sleep.²⁴ That is the same pattern that supports everything else, which is convenient.

Timing matters more than composition

Large meals close to bedtime tend to disrupt sleep, partly through simple discomfort and reflux and partly because digestion is not what your body is trying to prioritise overnight.²⁵ Leaving a couple of hours between your last substantial meal and bed is a reasonable default. Going to bed genuinely hungry is not better, and a small snack is fine if it helps you settle.

The tryptophan story, honestly told

You have probably heard that turkey, milk, or bananas make you sleepy because they contain tryptophan, the amino acid your body uses to make serotonin and then melatonin. The biochemistry is real. The everyday claim is weaker than it sounds, because tryptophan competes with other amino acids to reach the brain, and a protein-rich food delivers plenty of competitors alongside it. Trials using isolated tryptophan at meaningful doses show more than food studies do.²⁶ Eating a turkey sandwich is unlikely to be the reason you feel drowsy. That is mostly the meal size.

Carbohydrates in the evening

There is some evidence that carbohydrate-containing meals a few hours before bed can shorten the time it takes to fall asleep, possibly by helping tryptophan reach the brain.²⁴ This is a modest, mixed literature rather than a settled finding, and it sits awkwardly against popular low-carbohydrate advice. The reasonable reading is that a balanced evening meal including some whole-food carbohydrate is perfectly good for sleep, and that anyone telling you carbohydrates at night are ruining your rest is going beyond the data.

Supplements for sleep

This is the most crowded and least honest corner of the sleep market, so we will be plain about the strength of evidence for each, using the same approach as our Supplements 101 guide. None of these fixes a schedule problem, an anxiety problem, or an untreated disorder, and none should be the first thing you reach for.

The racing mind

For a great many people with sleep trouble, none of the above is the actual problem. The room is dark, the caffeine was at nine in the morning, the schedule is fine, and still the mind will not stand down. This deserves its own section, because it is common, it is treatable, and the standard advice mostly misses it.

Effort is the trap

Sleep is one of the few things that reliably retreats the harder you chase it. Trying to sleep produces vigilance, and vigilance is the opposite of what sleep requires. This is why a night of watching the clock and calculating how many hours remain almost never ends well, and why sleep anxiety becomes self-sustaining: a few bad nights create worry about sleeping, and the worry then causes the bad nights.³³

The counterintuitive way out is to lower the stakes rather than raise the effort. Getting out of bed when you have been lying awake for a while, and returning when you feel sleepy, breaks the association between your bed and frustration. Accepting that you will have some rough nights, and that one poor night is genuinely survivable, tends to reduce their frequency more than any amount of optimisation.

The treatment that actually works

If there is one thing in this guide worth knowing about, it is this. Cognitive behavioural therapy for insomnia is the recommended first-line treatment for chronic insomnia in clinical guidelines, ahead of medication.³⁴ Meta-analyses show meaningful, durable improvements in how quickly people fall asleep and how long they stay awake in the night.³⁵ Unlike sleeping tablets, the benefits tend to persist after the treatment ends.

It is not vague talking therapy. It is a structured programme, usually over a few weeks, that works on sleep timing, the bed as a cue, and the thought patterns that keep arousal high. It is available through healthcare systems in much of Europe, and there are also evidence-based digital programmes. Most people who could benefit have never heard of it, which is a genuine failure of public health messaging rather than a fault of theirs.

Stress, and the loop it creates

Stress and sleep feed each other in both directions: stress degrades sleep, and poor sleep reduces your capacity to handle stress.³³ Breaking in anywhere helps. Mindfulness-based approaches have reasonable evidence for improving sleep quality, and simple wind-down practices work partly by giving the mind a boundary between the day and the night.³⁶

A practical suggestion that costs nothing: if your mind reliably starts problem-solving the moment your head hits the pillow, give it an earlier appointment. Ten minutes with a notebook in the evening, writing down what is unresolved and what the next step is, works better than trying to suppress the thoughts at midnight.

How the world sleeps

It is worth stepping outside the modern optimisation frame for a moment, because sleep looks different across cultures and across history, and that perspective is genuinely useful for calibrating what is normal.

The eight-hour block is not ancient

Historical research on pre-industrial Europe describes references to a first and second sleep, with a period of quiet wakefulness in between used for talking, praying, or thinking.³⁷ How universal this was is debated among historians, and it should not be oversold as proof that humans are naturally biphasic. But it is a useful corrective to the idea that waking in the night is inherently pathological. For much of history it was unremarkable.

What pre-industrial societies actually do

A frequently cited study measured sleep in three contemporary societies without electricity and found something surprising to anyone expecting a lost golden age: they slept around six to seven hours a night, less than many assume, with sleep timing driven strongly by temperature and light rather than by darkness alone.³⁸ They also had very low rates of insomnia. The lesson is less about duration and more about regularity and environmental anchoring.

Napping cultures

Plenty of cultures build a daytime sleep into normal life. In Japan, inemuri, the practice of dozing in public, is read as a sign of dedication rather than laziness. Across the Mediterranean, the Middle East, and much of Latin America, an afternoon pause has long been standard. These are not indulgences. Most people feel a genuine dip in alertness in the middle of the afternoon, and a culture that builds around it is arguably reading the biology more accurately than one that powers through with coffee.

Europe's own differences

You do not have to leave Europe to find real variation, and a few of the differences are distinct enough to be worth knowing.

The clearest is the gap between clock time and sun time. Your body entrains to the sun rather than to the hour on your phone, and within a single time zone the sun rises progressively later as you move west. Research has shown human circadian timing tracks sun time rather than social time, producing measurable differences in sleep timing between the eastern and western edges of the same zone.³⁹ Spain is the striking case, sitting geographically in line with the UK and Portugal but running on central European time. Solar noon arrives late, evenings feel earlier than they are, and the famously late Spanish dinner and bedtime follow from that rather than from national temperament.

The siesta is the second. It reflects a sensible response to midday heat and to the natural afternoon dip in alertness that most people feel, and it has been studied seriously: a large Greek cohort found regular siesta taking was associated with lower coronary mortality, particularly in working men.⁴⁰ That is observational and should not be read as a prescription to nap. It is a fair signal that the single consolidated block northern Europe treats as standard is a convention rather than a rule. The practice is declining across southern Europe as work patterns change, which is itself a small natural experiment worth watching.

The third is one Europe argues about openly: the twice-yearly clock change. Chronobiologists have made a sustained case for abolishing seasonal clock changes, on the grounds that the spring shift in particular misaligns social schedules from the body clock for weeks.⁴¹ The European Parliament voted in 2019 to end the practice, and implementation has since stalled among member states. If you find the March change genuinely difficult, you are not imagining it, and you are in good scientific company.

Beneath all this variation, though, northern and southern Europe are solving the same problem with different tools. Long summer evenings and dark winters push northern habits towards blackout curtains, daylight lamps, and a determined tradition of being outdoors in whatever light exists. Heat and late sun push southern habits towards shuttered rooms, later meals, and an accepted afternoon pause. Neither is the correct way to sleep. Both are sensible adaptations to local light and temperature, which is exactly what the biology asks for.

Where the advice overreaches

Sleep has attracted more confident, poorly supported advice than almost any other health topic, partly because so much can be sold against it. Here are the claims we think have run furthest ahead of the evidence.

"Blue-light glasses will fix your evenings"

The underlying science, that evening light suppresses melatonin and delays sleep, is sound.¹⁶ The leap to blue-filtering glasses as the solution is where it breaks down. A Cochrane review of blue-light filtering spectacle lenses found no reliable evidence of benefit for sleep outcomes.³⁹ Reducing overall brightness in the evening is well founded. A specific pair of amber glasses as the fix is not, and if you are wearing them while scrolling something stressful, the glasses were never the main issue.

"Your sleep tracker knows how you slept"

Consumer sleep trackers are reasonably good at estimating total sleep time and quite poor at identifying sleep stages compared with clinical polysomnography.⁴⁰ The deep sleep number that ruins your morning is an estimate from movement and heart rate, not a measurement of your brain.

There is a documented downside too. Clinicians coined the term orthosomnia for people whose sleep worsened because of anxious pursuit of ideal tracker scores.⁴¹ Trackers are genuinely useful for spotting long-term patterns, such as a drifting schedule or the effect of alcohol. They are not useful as a nightly report card, and if yours is making you anxious, putting it away is a legitimate intervention.

"Every bad night is doing permanent damage"

Some popular sleep messaging leans heavily on fear, framing short sleep as a direct route to dementia, cancer, and early death. The long-term epidemiology linking chronically poor sleep with worse health outcomes is real and worth respecting.¹⁴⁴ Turning that into alarm about individual nights is both unsupported and actively counterproductive, because anxiety about sleep is itself one of the main drivers of insomnia. Your body handles occasional short nights perfectly well. It has been doing so your whole life.

"Everyone needs eight hours"

Covered above, but worth repeating here because it causes so much unnecessary distress. The recommendation is a range, individual need varies, and treating a number as a target you failed to hit is a reliable way to make sleep worse.¹²

"Alcohol helps you sleep"

The most persistent folk belief in the category, and the evidence is clear that it degrades the quality of the night even when it shortens the time to fall asleep.²⁰

When it is more than a bad night

Everything in this guide assumes ordinary sleep difficulty. Some sleep problems are medical conditions, and no amount of sleep hygiene will resolve them. Recognising the difference matters, because these are treatable and many people live with them for years unnecessarily.

Chronic insomnia

Persistent difficulty falling or staying asleep, several nights a week over months, with daytime consequences, is a recognised condition affecting a meaningful share of adults.⁴² As covered above, the first-line treatment is cognitive behavioural therapy for insomnia rather than medication.³⁴ If this describes you, that is the thing to ask about by name.

Sleep apnea

Sleep apnea involves repeated pauses in breathing during sleep, and it is both common and substantially underdiagnosed.⁴³ The signals worth noticing are loud habitual snoring, witnessed pauses in breathing, waking unrefreshed after adequate hours, morning headaches, and heavy daytime sleepiness. It is often assumed to affect only older men with higher body weight, which causes it to be missed in women and in people of normal weight. It is strongly worth investigating because untreated apnea carries real cardiovascular risk and because treatment can transform daily life.

Restless legs

An uncomfortable urge to move the legs, worse in the evening and at rest, relieved by movement, is characteristic of restless legs syndrome.⁴⁴ It is worth mentioning to a doctor partly because it is associated with iron deficiency, which is checkable and treatable.

Hormonal shifts across life

Sleep changes with hormonal state, and this is under-discussed. Many women notice differences in sleep across the menstrual cycle, particularly in the days before a period.⁴⁵ Pregnancy and the perimenopausal years both commonly bring disrupted sleep, with night-time waking and temperature disturbance frequently reported around menopause. If your sleep changed noticeably at a hormonal transition, that is a recognised pattern and a reasonable thing to raise with a clinician rather than something to push through alone.

Sleep and mental health

Sleep problems and mood difficulties are closely intertwined, each capable of driving the other. Persistent insomnia is associated with a higher risk of later depression, which is one reason treating sleep properly matters beyond the sleep itself.⁴⁶ If low mood, anxiety, or hopelessness are travelling alongside your sleep difficulty, please treat that as a reason to speak to a doctor or another professional. You deserve support with both, and they are usually more treatable together than separately.

Building a night that works

Putting it together, here is what a well-built day looks like from a sleep point of view. Read it as a menu rather than a checklist, and change one thing at a time. Attempting all of it at once is its own kind of pressure.

In the morning

• Wake at a similar time, including at weekends. This is the anchor everything else hangs from.
• Get outside for daylight reasonably soon after waking, even briefly, even when it is grey.
• Have your coffee if you want it, and enjoy it without guilt. Timing matters more than abstinence.

Through the day

• Move your body in some form, at whatever intensity fits your life.
• Draw a line under caffeine somewhere in the first half of your day, then adjust based on how you sleep.
• Keep naps short and earlier in the afternoon if you nap at all.
• Get more daylight if you can, particularly in winter when the total available is small.

In the evening

• Eat your main meal with a couple of hours to spare before bed where possible.
• Dim the lights as the evening goes on. Overall brightness matters more than any particular filter.
• Consider a warm bath or shower an hour or two before bed. It is one of the better-supported tricks available.
• Give your mind an earlier slot for unresolved things, on paper, rather than at midnight.
• Be honest about alcohol as a sleep aid, since it is working against you rather than for you.

In bed

• Keep the room cool, genuinely dark, and quiet enough.
• If you are lying awake and frustrated, get up, do something calm and dull in low light, and come back when sleepy.
• Turn the clock away. Knowing the time at three in the morning has never helped anyone.
• Let one bad night be one bad night. The next one is not determined by it.