How to Sleep Better at Night: Evidence-Based Steps

Short answer: Keep the same wake time every day, get daylight within an hour of waking, keep the bedroom dark and around 18°C, and stop caffeine eight hours before bed. These four changes have the strongest evidence and cost nothing.

Sleep advice online is crowded with supplements and gadgets. The interventions clinicians actually use in cognitive behavioural therapy for insomnia are behavioural and unglamorous — and they work better than anything sold in a bottle.

Start with the wake time, not the bedtime

Your body clock anchors to when light hits your eyes in the morning, not to when you turn the lamp off. Fixing the wake time — including weekends — pulls the whole cycle into place within a week or two. Bedtime then follows naturally once you are genuinely tired.

The core routine

1. Set one wake time, seven days a week, and get out of bed at it.
2. Spend 10–20 minutes outdoors within an hour of waking, even in cloud.
3. Cut caffeine eight hours before bed; it has a half-life of around five hours.
4. Keep the bedroom dark, quiet and cool — 17–19°C suits most people.
5. Use the bed for sleep only, so your brain stops associating it with scrolling.

If you wake in the middle of the night

Lying awake for over 20 minutes trains your brain to treat bed as a place of frustration. Get up, sit somewhere dim and dull, and return only when sleepy. It feels counterproductive for a few nights and then it works.

What the evidence says about common fixes

When to see a doctor

Loud snoring with pauses in breathing, persistent daytime sleepiness despite adequate hours, or insomnia lasting more than three months all warrant a medical assessment rather than another app.