Everyday essentials
How to build a consistent sleep routine
How to make time for sleep, keep waking times consistent, finish evening tasks, and recognize when persistent difficulty needs treatment.
Read the guideThe guide library
Sleep guides
Browse guides to sleep habits, sleep science, common problems, and sleep history. Each explains the evidence and how it applies to everyday decisions.
Everyday foundations
Routines, bedroom comfort, sleeping position, food, and exercise.
Everyday essentials
Make your bedroom more comfortable for sleep
Practical checks for bedroom temperature, noise, light, mattresses, and bedding before spending money.
Read the guideEveryday essentials
Sleeping positions and pillow support
Side, back, and stomach sleeping, pillow adjustments, and position advice for reflux, pain, and sleep apnea.
Read the guideEveryday essentials
Caffeine, alcohol, meals, and sleep
How caffeine, alcohol, meal timing, reflux, hydration, and supplement use can affect sleep.
Read the guideEveryday essentials
Exercise timing and sleep
How regular movement and exercise timing relate to sleep, with a practical way to interpret new studies and your own response.
Read the guideUnderstand your sleep
Sleep stages, body-clock timing, naps, memory, and wearable measurements.
Sleep science
Sleep pressure, body clocks, and sleep stages
Understand sleep pressure, body clocks, sleep stages, and why the way you feel is only one measure of whether you are getting enough rest.
Read the guideSleep science
How light and daily timing affect your body clock
Learn how light and daily timing influence your body clock, why morning light is not a universal prescription, and when a shifted sleep schedule needs help.
Read the guideDaily rhythm
How long should a nap last?
How to think about nap length, sleep inertia, siesta research, and the famous NASA nap without turning averages into rules.
Read the guideSleep science
Six common claims about sleep, checked
A closer look at sleep cycles, adapting to short nights, aging, caffeine, mattress firmness, and insomnia advice.
Read the guideSleep science
How much can a sleep tracker tell you?
What consumer sleep trackers measure, how to interpret validation studies, and when a score stops being useful.
Read the guideSleep science
What sleep does for memory
How sleep supports learning before and after practice, why memory cues are not sleep learning, and what brain clearance studies can actually tell us.
Read the guideSleep & health
Symptoms, assessment, and treatment options for common sleep concerns.
Sleep & health
Recurring sleep problems: when to seek help
Organize recurring sleep symptoms, recognize when to seek care, and prepare a useful conversation with a healthcare professional.
Read the guideSleep concerns
Insomnia symptoms and CBT-I treatment
Understand chronic insomnia, what CBT-I changes, how to seek effective treatment, and why simply spending longer in bed can miss the problem.
Read the guideSleep concerns
Sleep apnea symptoms, testing, and treatment
Recognize common sleep apnea symptoms, understand testing and treatment, and know why a negative home test may need follow-up.
Read the guideSleep concerns
Restless legs syndrome: symptoms and treatment
Recognize restless legs syndrome, understand iron testing and treatment guidance, and prepare a record of symptoms and medicines for assessment.
Read the guideSleep science
Melatonin for sleep timing: evidence and safety
Understand melatonin's role in sleep timing, the limits of insomnia evidence, variable supplement contents, and the questions to ask before using it.
Read the guideLife and sleep
Sleep in midlife and older age
Understand lighter sleep, menopause-related disruption, medication effects, and evidence for treating insomnia across midlife and older age.
Read the guideLife and sleep
Sleep between night shifts
Build a realistic shift-work sleep plan around protected sleep time, light, naps, caffeine timing, safe travel, and the limitations of rotating schedules.
Read the guideSleep science
Dreams, nightmares, and when to seek help
What dream research can establish, where interpretation outruns evidence, and how to seek useful care for nightmares or physical dream enactment.
Read the guideSleep in the wider world
Sleep history, documented personal accounts, and sharing a bed.
Sleep history
Did people used to sleep in two shifts?
What first and second sleep reveal about history, human adaptability, and the limits of ancestral sleep advice.
Read the guideSleep stories
An open window, a sleep tracker, and an evening shower
Three attributable sleep stories, from John Adams and Benjamin Franklin to a modern sleep clinic and a researcher’s evening shower.
Read the guideLife and sleep
Sharing a bed with different sleep needs
Practical arrangements for different bedtimes, snoring, movement, temperature preferences, separate sleeping spaces, and overnight caregiving.
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