Sleep Hygiene: The Science-Based Guide to Deep, Restorative Sleep
Good sleep isn't about willpower — it's about working with your circadian biology. The research on light timing, sleep pressure, and arousal regulation gives us a clear set of levers that actually move the needle on sleep quality.
Key Research Findings
Consistency > duration
Variable sleep timing (social jet lag) predicts worse metabolic and mood outcomes than shorter but consistent schedules — even with equal total hours.
Morning light anchors the clock
Huberman and circadian researchers agree: 2–10 minutes of outdoor light within the first hour after waking is the single strongest non-pharmacologic way to normalize sleep timing.
Cool, dark, boring
The three classical sleep-environment levers — ≈18°C room, minimal light exposure after dusk, and low-stimulation pre-sleep activity — outperform most supplements in controlled trials.
Published Articles
Coming Soon
Articles our editorial team is researching and writing. Each will be published once it passes our evidence review.
How to Fall Asleep Faster: 12 Research-Backed Techniques
Twelve sleep-onset techniques ranked by effect size — from cognitive shuffling to paradoxical intention to 4-7-8 breathing.
Building a Sleep Routine That Actually Works
A step-by-step sleep routine grounded in circadian science — what to do in the 3 hours, 1 hour, and 15 minutes before bed.
Blue Light and Sleep: What the Research Actually Says
The nuanced truth about screens and melatonin suppression — what the evidence supports, and where the conventional advice overshoots.
Sleep Anxiety: Why You Can't Switch Off at Night
The cognitive and physiological mechanisms behind bedtime rumination — and the CBT-I techniques that reliably quiet them.
Frequently Asked Questions
What actually counts as "good" sleep hygiene?
The research consistently supports: (1) consistent sleep and wake times within ~30 min, seven days a week; (2) morning outdoor light exposure; (3) reducing bright and blue-enriched light 2–3 hours before bed; (4) cool, dark, quiet sleep environment; (5) caffeine cutoff 8+ hours before bed; (6) limiting alcohol near sleep; (7) a repeatable low-stimulation wind-down. Most other tips are minor compared to these.
How much sleep do I actually need?
The AASM consensus is 7+ hours for most adults, though individual needs range from 6 to 9 hours. Genuine short-sleepers (those who feel rested and function well on <6 hours) are rare — roughly 1–3% of the population. If you rely heavily on weekends to "catch up," you likely need more on weekdays.
Does melatonin actually help you sleep?
Melatonin is a circadian timing signal, not a sedative. It's most effective for jet lag and shift-work adjustment at low doses (0.3–1 mg) taken several hours before target sleep time. For general insomnia, the evidence is modest at best. This article is for educational purposes only and is not medical advice — talk to a clinician before adding any supplement.
Should I avoid all screens before bed?
The research is less absolute than the headlines suggest. Bright screens in the 2 hours before bed do suppress melatonin and delay sleep onset in controlled studies, but the effect size is moderate and varies by brightness, content, and individual sensitivity. A pragmatic approach: dim devices, avoid emotionally activating content, and favor reading over doomscrolling.
When should I see a doctor about sleep problems?
Consult a healthcare professional if you experience persistent insomnia for 3+ weeks, loud snoring with daytime sleepiness (possible sleep apnea), acting out dreams, irregular sleep-wake timing despite good habits, or sleep problems combined with mood changes. This article is educational only and is not a substitute for clinical evaluation.
Related Research Topics
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