The throughline across every article below: consistency beats duration. Van Dongen's 2003 sleep-restriction study found that two weeks of six-hour nights degraded performance as much as a full night of total deprivation — while subjects rated themselves as fine. You can't feel sleep debt accurately, so the fix is structural: a fixed wake time, a caffeine cutoff, and an evening routine that starts before you're tired. Pick the section that matches your bottleneck.
Complete guide · 11 articles
Sleep Habits: The Complete Guide
Good sleep isn't decided at 11pm — it's the output of a handful of habits that run all day: when you see light, when you cut caffeine, how you wind down, and what happens when the alarm goes off. This guide collects everything we've written on sleep, grounded in named research (Walker, Van Dongen, Borbély's two-process model) rather than "just go to bed earlier" advice. Start with your weakest link; each guide stands alone.
Evening routines & waking up early
The bookends of good sleep — a wind-down that actually works and a wake-up you don't have to fight.
- How to Stop Hitting Snooze: 7 Tricks That WorkSnoozing fragments your sleep and makes you groggier. Here are 7 evidence-based tricks to stop hitting snooze and get out of bed on the first alarm.
- How to Wake Up Energized: 9 Morning HabitsWaking up energized starts the night before. 9 science-backed habits — light, hydration, a consistent wake time — to beat morning grogginess for good.
- 9 Benefits of Waking Up Early (Backed by Research)Waking up early is linked to better mood, focus, and consistency. Here are 9 research-backed benefits and a realistic plan to become an early riser.
- How to Wake Up at 5am: What Time to Sleep + 7 HabitsTo wake at 5am, be asleep by 8:30–9:30pm for 7.5–8.5 hours of sleep. Plus an 8-week shift plan, 7 habits that make it stick, and when 5am is wrong for you.
- Evening Routine: 60-Min Wind-Down That WorksA 60-minute evening routine that improves sleep and pre-loads tomorrow. 8 trackable habits split into 3 phases — shutdown, wind-down, sleep window.
Sleep hygiene
The daily checklist that decides sleep quality hours before your head hits the pillow.
Sleep science: debt & caffeine
What sleep debt really is, how to repay it, and why caffeine timing matters more than dose.
- What Is Sleep Debt? How to Calculate & Repay ItSleep debt is the running total of sleep you've missed. Learn how it builds, how to calculate yours, and whether you can actually catch up on sleep.
- Best Time to Drink Coffee: The Science of Timing (2026)The best time to drink coffee isn't first thing in the morning. Here's what cortisol and caffeine's half-life say about timing — plus a free calculator.
Track your sleep
The apps worth using to measure what you're improving.
- Caffeine Tracker Apps: 7 Options With Screenshots (2026)Compare seven caffeine and habit trackers with official screenshots, verified pricing and clear limits. Find an option for iPhone, Android or cutting back.
- Best Dream Journal Apps: 6 Picks to Record Dreams (2026)The 6 best dream journal apps of 2026 — Oniri, Elsewhere, Lucidity & more — compared on capture speed, privacy, and price, plus how to make logging stick.
- 8 Best Sleep Tracker Apps for Better Rest (2026)The best sleep tracker apps for 2026, compared by accuracy, smart alarm, and price - plus the bedtime habits that improve sleep more than any app.
Free sleep tools
No signup — they run in your browser.
Turn better sleep into a daily streak
Every guide here comes down to the same thing: a fixed bedtime and wake time, kept daily. HabitBox keeps your bedtime habit one tap away on your home screen — free to start, no account needed.