Sleep guides —
everything you need to sleep better.
Every guide is written by our editorial team from published research, and linked to the exact tool or product you need to act on it. Free, no signup.
Browse by category
Sleep basics
How sleep actually works — cycles, stages, breathing science, what different age brackets need.
2 guides →
How to sleep better
Practical, action-first guides for adults who want to fix a sleep problem in the next 7 days.
13 guides →
Baby & child sleep
Research-based parent guides for newborn through preschool — the ones we send to friends.
5 guides →
Sleep disorders
Insomnia, sleep apnea, restless legs — when to see a doctor and what to do until you can.
2 guides →
Sleep + lifestyle
Jet lag, shift work, travel — for anyone whose sleep gets crushed by their calendar.
1 guide →
Recently updated
Freshness matters — every guide is revisited quarterly.
How to make a sofa bed more comfortable
The bar, the thin mattress and the sag: the fix for each, how to measure for a replacement, and what mattress research says.
9 min read
The sleep-friendly bedroom
No single ideal temperature exists; heat, light and noise are what the research says hurt sleep, and the fix for each.
7 min read
Sleep journaling — the 5-minute method
The four evidence-backed journaling types, which one fits your racing mind, and the journal-vs-sleep-diary distinction most guides miss.
8 min read
Sleep cycles explained (90-minute rule)
REM vs deep vs light — what actually happens in each stage and how the 90-minute cycle drives our sleep-cycle calculator.
7 min read
Breathing exercises for sleep
4-7-8, box breathing, and physiological sigh — which one actually works and when to reach for each.
6 min read
Caffeine and sleep
Half-life math, cutoff timing, and why your afternoon coffee still wrecks 3am — pairs with the caffeine-cutoff calculator.
8 min read
Read → calculate → shop
Every guide links to the free tool that automates the calculation, plus the product page where you can price- compare the recommended gear across retailers.