Sleep Hygiene: The Complete Guide to Better Rest
Sleep hygiene is the set of habits and conditions that make consistent, high-quality sleep more likely. It does not guarantee that you will fall asleep instantly. What it does, in the post's words, is create the conditions for your body's natural sleep processes to work. Sleep is not a luxury. The post lists tissue repair, memory consolidation, hormone regulation and immune function as the work that happens while you are asleep, and it cites the CDC's figure that one-third of adults regularly get less than the recommended 7 to 9 hours a night.
Sleep Is Not a Luxury
Sleep is as essential to health as nutrition and exercise. During sleep, your body repairs tissues, consolidates memories, regulates hormones, and strengthens the immune system. Chronic sleep deprivation increases the risk of heart disease, diabetes, obesity, depression, and cognitive decline.
Despite this, the CDC reports that one-third of adults regularly get less than the recommended 7-9 hours per night.
The Science of Sleep Hygiene
Sleep hygiene refers to habits and environmental factors that promote consistent, high-quality sleep. Good sleep hygiene does not guarantee you will fall asleep instantly, but it creates the conditions for your body's natural sleep processes to work optimally.
Environmental Factors
Temperature
The ideal bedroom temperature for sleep is 65-68 degrees Fahrenheit (18-20 degrees Celsius). Your core body temperature needs to drop slightly to initiate sleep, and a cool room facilitates this process.
Light
Even small amounts of light can suppress melatonin production. Use blackout curtains, remove or cover LED lights from electronics, and avoid bright bathroom lights if you wake up at night.
Sound
Consistent background noise (white noise or a fan) can mask disruptive sounds. Sudden sounds, not constant noise, are what typically wake people.
Mattress and Pillow
Replace your mattress every 7-10 years and pillows every 1-2 years. Your sleep surface should support your preferred sleep position without creating pressure points.
Behavioral Factors
Consistent Schedule
Go to bed and wake up at the same time every day, including weekends. This strengthens your circadian rhythm. A 30-minute deviation is acceptable, but larger swings disrupt your internal clock.
Wind-Down Routine
Create a 30-60 minute pre-sleep routine:
- Dim lights throughout the house
- Take a warm shower or bath (the subsequent body cooling promotes sleep)
- Read a physical book or listen to calm music
- Practice relaxation techniques like deep breathing
Screen Curfew
Stop using phones, tablets, and computers at least 30 minutes before bed. Blue light from screens suppresses melatonin, and engaging content keeps your brain active.
Caffeine and Alcohol
- Limit caffeine after 2 PM. Its half-life is 5-6 hours
- Avoid alcohol within 3 hours of bedtime. While it may help you fall asleep, it disrupts sleep architecture and reduces REM sleep
Tracking Sleep With LifeWell
Monitor your sleep patterns to identify what works:
- Log bedtime and wake time daily
- Rate sleep quality each morning
- Note factors that affected your sleep
- Review weekly trends to spot patterns
- Correlate with exercise and caffeine intake
When to Seek Help
If you consistently struggle to fall asleep, stay asleep, or feel rested despite adequate sleep time, consult a healthcare provider. Conditions like sleep apnea, restless leg syndrome, and insomnia are treatable.
Elsewhere on LifeWell
- Privacy — What LifeWell stores, where it sits, and who can read it back.
- Plans — What the free plan includes, and what each paid one adds.
- Export everything — Your whole record leaves in one file, on any plan, without giving a reason.
What people use it for
Log last night
Log last night at `/health/sleep`. One entry a night. Logging again replaces the night rather than adding to it, so a slip is fixed by re-entering it.
Read the seven-night chart on the check-in page
Read the seven-night chart on the check-in page, where a night you did not record is drawn as a gap, because it is a gap in the record and not a night without sleep.
Treat the hours goal as a working target rather than a…
Treat the hours goal as a working target rather than a number you are expected to hit, which is how the page itself describes it.
Use the sleep sounds page as a timer for whatever you…
Use the sleep sounds page as a timer for whatever you are already playing. LifeWell plays no audio.
Write the coffee
Write the coffee, the late film or the noisy street into the check-in note, so a pattern next month has something to be read against.
Questions
What is sleep hygiene?
Habits and environmental factors that promote consistent, high-quality sleep, in the post's definition. Temperature, light, sound and the surface you sleep on sit on one side of it; a consistent schedule, a wind-down routine, a screen curfew and where caffeine and alcohol fall in the day sit on the other. None of it guarantees sleep. All of it changes the odds.
What temperature should the room be?
The post gives 65 to 68 degrees Fahrenheit, or 18 to 20 Celsius. Its reasoning is that your core body temperature needs to drop slightly for sleep to begin, and a cool room helps that happen instead of working against it. It pairs that with blackout curtains and covering the small LEDs, since even a little light suppresses melatonin.
How late can I have coffee?
The post's rule is to limit caffeine after 2pm, on the basis that its half-life is 5 to 6 hours, and to keep alcohol out of the 3 hours before bed because it costs you REM sleep even where it helps you fall asleep. Your tolerance is your own. The record is what tells you where it sits.
Does LifeWell measure my sleep?
No. The hours are yours, by your own reckoning. The page says so where you type them. Nothing here reads a wearable or listens to the room. One entry a night is the whole model, and logging the same night again replaces it rather than adding a second, so a correction is only ever a correction.
What if I only log some nights?
The chart draws a night you did not record as a gap, and its own note explains why: that is a gap in the record, not a night without sleep. Two nights make a line. There is nothing here to keep going and nothing to break, so a fortnight with five nights in it is still worth looking at.
When is it worth seeing a doctor?
The post's answer is when you consistently struggle to fall asleep, stay asleep, or feel unrested despite enough time in bed. It names the causes as treatable and points you at a health professional rather than at an app. LifeWell does not interpret a run of short nights and will not tell you what one means.
By The LifeWell team · updated 2025-11-16
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