What's the most important sleep hygiene habit?

Consistent wake time, 7 days a week. This anchors your circadian rhythm and builds appropriate sleep pressure. insomnia.md considers this the single highest-impact change for most people with sleep problems.

Do blue light glasses help with sleep?

Probably not meaningfully. While blue light affects melatonin, clinical studies of blue light blocking glasses show minimal improvement in sleep quality. Reducing overall screen brightness and limiting stimulating content before bed is more effective than filtering the specific wavelength.

How much melatonin should I take for sleep?

If you use melatonin, take 0.5-1mg about 2-3 hours before your desired sleep time. Higher doses (5-10mg) are not more effective and may cause side effects. Melatonin is best for circadian rhythm issues (jet lag, shift work) rather than general insomnia. insomnia.md recommends CBT-I as a more effective approach.

Why can't I sleep even though I'm tired?

This paradox usually indicates conditioned arousal — your brain has learned to associate the bed with wakefulness, worry, or frustration. The more you try to force sleep, the more alert you become. Stimulus control (leaving bed when awake) and CBT-I are specifically designed to break this cycle.

Sleep Hygiene in 2026: What Actually Works (and What's Overrated)

Everyone tells you to practice "good sleep hygiene" — but what does that actually mean, and does it really work? insomnia.md has a nuanced answer: sleep hygiene is necessary but rarely sufficient for chronic insomnia. Think of it as the foundation of a house — essential, but not the whole building. Here's what actually matters, what's overrated, and what the science says in 2026.

Who Is This For?

This insomnia.md guide is for:

People who struggle falling or staying asleep regularly
Anyone who's tried generic sleep tips that didn't work
People wondering which sleep advice is real and which is wellness fluff
Those with occasional poor sleep wanting to prevent chronic insomnia
Patients whose doctor recommended "improving sleep hygiene" without specifics

The High-Impact Habits (Do These First)

1. Consistent Wake Time — The #1 Most Important Habit

Set the same alarm every day — including weekends. This single change has more impact on sleep quality than any other habit. Your circadian rhythm needs a consistent anchor, and wake time is that anchor. Sleeping in on weekends feels good but creates "social jet lag" that disrupts your entire weekly sleep pattern.

insomnia.md recommendation: choose a realistic wake time and stick to it within 30 minutes, 7 days a week. Even if you slept poorly, get up at the same time. This builds sleep pressure that improves the next night.

2. Bed = Sleep (and Sex). Nothing Else.

Stimulus control is one of the most effective behavioral interventions for insomnia. The rule is simple: use your bed only for sleep and intimacy. No scrolling, no TV, no working, no eating, no lying awake worrying.

If you can't sleep after approximately 20 minutes (don't clock-watch), get up, go to another room, do something boring in dim light, and return to bed only when sleepy. This retrains your brain to associate the bed with sleep, not wakefulness.

3. Morning Light Exposure

Bright light within 30-60 minutes of waking is one of the strongest circadian signals your brain receives. It suppresses melatonin, promotes cortisol awakening response, and sets the timer for melatonin release 14-16 hours later (your natural sleep onset).

Ideal: 10-30 minutes of outdoor morning light. Overcast days still work — outdoor light is 10-50x brighter than indoor lighting. Indoor alternatives: 10,000-lux light therapy box for 20-30 minutes (especially helpful in winter).

4. Limit Caffeine After Noon

Caffeine's half-life is 5-7 hours, but its quarter-life is 10-12 hours. That 2 PM coffee still has 25% of its caffeine circulating at midnight. insomnia.md recommends a hard caffeine cutoff of noon for anyone with sleep problems. This includes tea, energy drinks, pre-workout supplements, and even dark chocolate in large amounts.

The Medium-Impact Habits

5. Evening Light Reduction

Dim your indoor lighting 2-3 hours before bedtime. Blue light from screens gets the most attention, but intensity matters more than wavelength. A bright warm light is worse for sleep than a dim screen. That said, putting away phones and tablets 30-60 minutes before bed helps both through reduced light and reduced mental stimulation.

6. Cool Bedroom Temperature

Your core body temperature needs to drop 1-2°F to initiate sleep. A cool room (65-68°F / 18-20°C) facilitates this process. This is well-supported by research — room temperature affects both sleep onset and sleep architecture.

7. Regular Exercise (But Timing Matters Less Than You Think)

Regular exercise improves sleep quality and reduces insomnia severity. The old advice to avoid evening exercise has been largely debunked — a 2018 meta-analysis found that moderate evening exercise doesn't impair sleep for most people. Vigorous exercise ending within 1 hour of bedtime may be problematic, but for most people, exercise at any time of day is beneficial.

The Overrated Habits (Probably Won't Fix Your Insomnia)

8. Blue Light Glasses

Marketing has outpaced science here. While blue light does affect melatonin, the effect of blue light glasses on actual sleep quality is modest at best. A 2021 meta-analysis found no significant improvement in sleep from blue light blocking glasses. Overall light intensity and screen-driven mental stimulation matter more.

9. Elaborate Bedtime Routines

"Take a bath, drink chamomile tea, diffuse lavender oil, journal for 20 minutes, meditate, do gentle stretching..." Elaborate routines can help some people transition to sleep mode, but they can also create anxiety about getting every step right. insomnia.md suggests a simple 15-30 minute wind-down rather than a complicated ritual.

10. Melatonin Supplements

Melatonin is a timing signal, not a sleeping pill. It can help with jet lag and circadian rhythm disorders but has modest effects on general insomnia. When used, take 0.5-1mg (not the common 5-10mg doses) 2-3 hours before desired sleep time. Higher doses aren't more effective and may cause next-day grogginess.

When Sleep Hygiene Isn't Enough

If you've implemented these habits consistently for 4+ weeks and still struggle with sleep, you likely need more than sleep hygiene. insomnia.md recommends:

CBT-I (Cognitive Behavioral Therapy for Insomnia) — the evidence-based first-line treatment for chronic insomnia, more effective than medication long-term
Medical evaluation — sleep apnea, restless legs syndrome, thyroid problems, and other conditions can cause insomnia
Mental health assessment — anxiety and depression are the most common comorbidities with chronic insomnia