Sleep Hygiene vs Sleep Environment Design
People often use "sleep hygiene" as a catch-all, but it helps to separate two things: the habits you keep (hygiene) and the space you sleep in (environment design). You need both — great habits in a bad room, or a perfect room with chaotic habits, will still let you down.
Sleep hygiene: your habits
- Consistent sleep and wake times — the backbone of circadian alignment.
- Caffeine before early afternoon; go easy on late alcohol.
- A wind-down routine and dim evening light.
- Using the bed for sleep, not scrolling or working.
Environment design: your room
- Dark: blackout curtains or an eye mask.
- Cool: around 16–18°C — see cooling mattresses.
- Quiet: earplugs or steady white noise.
- Tech-free: charge the phone in another room.
Put them together
Fix the environment once — it keeps paying off every night with no willpower needed — then layer the habits on top. This is the difference between occasional good nights and a reliably restful baseline. If you have done both and still struggle, explore non-drug sleep aids and see your GP. The Sleep Foundation's sleep hygiene guide and NHS sleep advice are trustworthy starting points.