Sleep
Sleep is the foundation layer for energy, mood, focus, recovery, and habit change — and most self-improvement advice falls apart when sleep is unstable.
A practical reference page for sleep, anchored by the official guide and expanded with curated source material.
1 official guide · 1 experts · 1 articles · 1 websites · 2 videos · 1 events
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Editorial anchor
The Official Guide to Sleep
Featured expert
Matthew Walker
Sleep scientist and public-facing educator whose work made the biology and consequences of sleep easier for mainstream audiences to understand.
Matthew Walker is the Official Guide for Sleep on SelfGrowth. A neuroscientist and sleep researcher, he helps people understand why sleep matters and how to improve it.
Start there for the core framework, then use the topic sections below for supporting experts and practical references.
March 29, 2026
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What Sleep covers
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Websites
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Video
Sleep Hygiene: 5 Habits That Actually Work
Cut through the noise and focus on the five sleep hygiene habits backed by clinical research.
March 29, 2026
Video
How to Reset Your Sleep Schedule Without Wrecking Your Evenings
Sleep scientist Matthew Walker explains practical steps to fix your sleep cycle without extreme measures.
March 29, 2026
Events