How to sleep better

Last reviewed: 14 September 2026

There is no shortage of sleep advice. What is missing from most of it is an order — which change to make first, and which ones barely matter until you have.

Two changes do most of the work

Fix your wake-up time, and get daylight soon after it. Between them those two do more for sleep than every other piece of advice combined, because both act on the body clock that decides when you will feel sleepy tonight.

Everything below is worth doing. But if you only change two things, change those.

What to try, in order

Set one wake-up time and keep it seven days a week, within about an hour at weekends. Do this for two weeks before judging anything else.
Get outside within an hour of waking. Fifteen minutes. Outdoor light is many times brighter than indoor light even under cloud.
Work out how much sleep you actually need and make room for it. Adults need 7 to 9 hours — our guide to how much sleep you need has a way to find your own number rather than the average.
Move caffeine to the morning and see what happens after a fortnight.
Cut the evening alcohol. It is the single most underestimated cause of poor-quality sleep in people who otherwise sleep enough.
Cool and darken the bedroom.
Build a wind-down — 30 to 60 minutes of dimmer light and no work. The bedtime routine calculator will lay your evening out backwards from lights out.
Stop lying in bed awake. If you are still awake after about 20 minutes, get up.

Why that order

Most sleep advice is presented as an undifferentiated list, which leaves people doing the easy low-impact things — buying a pillow spray, installing a blue-light filter — while the high-impact ones go untouched.

The ordering above follows the mechanism. Sleep timing is governed by a body clock that takes its main cue from light, and its strongest anchor is when you get up. Change that and the evening follows. Change the evening alone and you are pushing against the clock.

Give it a fortnight

The body clock shifts at roughly an hour a day at best, and more reliably at about 15 minutes every few days. Three nights tells you nothing. Judge any change by how the mornings look after two weeks.

The full set of guides

If you sleep enough and it still isn't working

Once you are inside the recommended hours, the limiting factor is usually one of four things:

Fragmentation. Frequent brief arousals you will not remember.
Timing. Enough hours, at hours that fight your body clock.
Alcohol. Suppresses REM and breaks up the second half of the night.
An undiagnosed problem. Sleep apnoea is the commonest, and the most commonly missed. Anaemia, thyroid disorders and depression all produce unrefreshing sleep too.

When to stop self-helping and see a GP or doctor

The NHS advises seeing a GP or doctor if changing your sleep habits has not helped, if you have had trouble sleeping for months, or if it is affecting your daily life. Also see a GP or doctor if anyone has noticed you gasping, snorting or choking in your sleep — that points at sleep apnoea, which no amount of sleep hygiene will fix.

Sources. Self-help advice follows NHS guidance on insomnia, sleep and tiredness, alongside the American Academy of Sleep Medicine's recommendations. Cognitive behavioural therapy for insomnia (CBT-I) is the treatment the NHS recommends for persistent insomnia. This page is general wellbeing information, not medical advice — see a GP or doctor if sleep problems have lasted months or are affecting your daily life.

Common questions

How can I sleep better at night?

Start with a fixed wake-up time kept seven days a week, and get daylight within an hour of waking. Those two act on the body clock that decides when you feel sleepy. After that: enough hours, caffeine in the morning only, less evening alcohol, and a cool dark bedroom.

What is the fastest way to improve sleep?

A consistent wake-up time. It is the strongest single anchor for the body clock, it costs nothing, and it makes an earlier bedtime feel natural rather than forced. Give it two weeks.

How long does it take to improve your sleep?

Around two weeks to judge a change fairly. The body clock shifts at roughly an hour a day at best, so a few nights tells you very little.

Why do I sleep 8 hours and still feel tired?

Usually quality rather than quantity: fragmented sleep, inconsistent timing, alcohol, or an undiagnosed problem such as sleep apnoea. Persistent tiredness on adequate sleep is worth taking to a GP or doctor.

Does sleep hygiene actually work?

It helps, and it is the right foundation, but tested on its own it is one of the weaker interventions for insomnia. For persistent insomnia the NHS recommends cognitive behavioural therapy for insomnia.