How to Build Better Sleep Habits: A Science-Backed Step-by-Step Guide

Sleep problems are common, and most of the fixes recommended by U.S. health agencies do not involve medication. The Centers for Disease Control and Prevention (CDC) and the National Heart, Lung, and Blood Institute (NHLBI), part of the National Institutes of Health, publish similar sets of habits — often called "sleep hygiene" — that are designed to work with the body's natural sleep-wake cycle rather than against it.

How much sleep do adults actually need?

The CDC recommends that adults aged 18 to 60 get seven or more hours of sleep every 24 hours. For adults aged 61 to 64, the agency recommends 7 to 9 hours, and for those 65 and older, 7 to 8 hours.

The CDC distinguishes sleep duration from sleep quality, describing quality sleep as getting uninterrupted, refreshing sleep rather than simply logging enough hours in bed — meaning not waking frequently during the night and waking feeling rested rather than fatigued.

Step-by-step: building the habit

1. Set one wake-up time and one bedtime, and keep them on weekends too — the NHLBI advises limiting weekend variation to about one hour so the body's internal rhythm is not disrupted.
2. Get outside in daylight. The NHLBI and the Sleep Foundation both identify natural light exposure during the day as a key signal that keeps the circadian clock aligned with day and night.
3. Stop caffeine by early-to-mid afternoon. The NHLBI notes caffeine's effects can last up to eight hours, so a late-afternoon coffee can still be active at bedtime.
4. Avoid alcohol close to bedtime. The CDC and the Sleep Foundation both warn that while alcohol can make falling asleep easier, it disrupts sleep later in the night and reduces its restorative quality.
5. Skip large meals in the hours before bed, per CDC guidance.
6. Exercise regularly, but avoid vigorous activity in the hour before sleep, which the NHLBI advises against because it can keep the body alert rather than relaxed.
7. Dim lights and put screens away 30 to 60 minutes before bed. The Sleep Foundation notes bright light, including from devices, can suppress melatonin, the hormone that signals the body it is time to sleep; the CDC recommends turning off electronics at least 30 minutes before bedtime.
8. Keep the bedroom cool, dark and quiet. The Sleep Foundation suggests a temperature around 65°F (about 18°C), along with heavy curtains or an eye mask for darkness and earplugs or a white-noise machine for quiet; the NHLBI gives the same cool-dark-quiet guidance.
9. Use the hour before bed for quiet time. The NHLBI advises avoiding intense exercise and bright screens during this period, and suggests a warm bath or other relaxation techniques.
10. Limit daytime naps to 20 minutes and schedule them earlier in the afternoon, the NHLBI advises, to avoid interfering with nighttime sleep.

Why these habits work

Most of these recommendations target the circadian rhythm, the roughly 24-hour internal clock that regulates when the body feels alert or sleepy. The Sleep Foundation states that light — especially sunlight — is one of the key drivers of this rhythm, which is why consistent wake times and daytime light exposure are repeated across agency guidance, while evening light and late caffeine or alcohol work against it.

Health stakes of insufficient sleep

The CDC links adequate sleep to getting sick less often, maintaining a healthy weight, lower stress, and better mood, and states that insufficient sleep is associated with higher risk of type 2 diabetes, heart disease, high blood pressure and stroke.

The CDC advises that people with persistent sleep problems — ongoing trouble falling asleep, frequent nighttime waking, or daytime fatigue despite enough hours in bed — talk to a healthcare provider, who may ask them to keep a sleep diary or recommend a sleep study, and notes that conditions such as insomnia, restless legs syndrome, narcolepsy and sleep apnea require evaluation beyond sleep hygiene adjustments. The Sleep Foundation makes the same point: hygiene habits support healthy sleep but are not a substitute for professional evaluation of a diagnosed sleep disorder.