Sleep Hygiene: 10 Habits for Better Sleep Tonight

Sleep hygiene refers to the collection of daily habits, behaviours, and environmental conditions that affect sleep quality. The term sounds clinical but the concept is practical: certain things reliably improve sleep and others reliably disrupt it. The ten habits below are among the most consistent in the research.

1. Keep a Consistent Wake Time

The wake time is the primary anchor of the circadian clock. Going to bed at the same time each night matters, but waking at the same time matters more. The circadian system uses the wake time to calibrate the timing of cortisol, melatonin, body temperature, and the accumulation of sleep pressure across the day.

Varying wake time by more than an hour across days creates circadian drift that makes falling asleep at the desired time harder and waking at the desired time harder. Maintaining a consistent wake time seven days a week, including weekends, is the single most stabilising thing you can do for sleep quality.

2. Get Outside in the Morning

Light exposure within the first hour of waking is the primary environmental signal the circadian clock uses to calibrate daily timing. Outdoor light, even on overcast days, provides significantly more intensity than indoor lighting. Five to fifteen minutes outside without sunglasses delivers the morning light signal that sets melatonin timing for the evening and improves alertness throughout the day.

3. Set the Bedroom Temperature to Around 18 Degrees

Sleep requires a drop in core body temperature. A bedroom that is too warm prevents this cooling and reduces deep sleep. Most research places the optimal range at 15 to 19 degrees Celsius. If your bedroom runs warmer than this, addressing temperature is one of the most impactful changes available.

4. Stop Screens 60 to 90 Minutes Before Bed

Blue light from screens suppresses melatonin and maintains cognitive arousal at a time when the brain needs to wind down. Stopping screen use 60 to 90 minutes before your intended sleep time allows melatonin levels to begin rising and the nervous system to begin the transition toward sleep. For more on the mechanisms behind this and what to do instead, see our article on how to fall asleep faster.

5. Dim Lights in the Evening

Overhead artificial lighting, particularly LED lighting, is blue enriched and suppresses melatonin in the same way screens do. Dimming lights and switching to warm toned lamps in the two hours before bed reduces the melatonin suppressing effect of the broader light environment.

6. Avoid Caffeine After 2pm

Caffeine has a half life of approximately five to six hours in most people. A coffee at 3pm means that half the caffeine is still active at 8 or 9pm. Caffeine blocks adenosine receptors, and adenosine is the sleep pressure chemical that accumulates during waking and drives the urge to sleep. Evening caffeine blunts this drive, reduces deep sleep even when people feel they sleep normally, and delays sleep onset.

7. Reserve the Bed for Sleep Only

The bed should be associated exclusively with sleep. Working in bed, watching television in bed, and scrolling in bed all build an association between the bed and wakefulness. The brain learns through conditioning, and a bed that is used for many activities becomes a cue for arousal rather than for sleep. When the bed is used only for sleep, the physical act of getting into it becomes a sleep onset cue.

8. Do Not Lie in Bed Awake for Long Periods

If you are lying in bed awake for more than 20 minutes, get up and go to another room. Do something quiet until you feel sleepy, then return to bed. This is the stimulus control principle from cognitive behavioural therapy for insomnia. Lying awake in bed, especially while frustrated or anxious about not sleeping, reinforces the association between bed and wakefulness. Getting up breaks this association.

9. Avoid Alcohol Within Three Hours of Bedtime

Alcohol feels like it helps with sleep because it is sedating and can reduce sleep onset time. But alcohol suppresses REM sleep, increases sleep fragmentation in the second half of the night, and reduces overall sleep quality significantly. The sedation it produces is not the same as natural sleep architecture. Avoiding alcohol in the three hours before bed preserves sleep quality in ways that matter for restoration and memory consolidation.

10. Build a Consistent Wind Down Routine

The nervous system responds to consistent pre sleep sequences. A routine of low stimulation activities in the 30 to 60 minutes before bed, whether reading, light stretching, a warm shower, or breathing exercises, teaches the nervous system that sleep is approaching. Over time, beginning the routine becomes a biological signal that triggers the transition toward sleep, reducing the time spent lying awake before sleep onset. For specific guidance on building an effective evening routine, see our article on bedtime routine for adults.

What This Means for Your Sleep

Sleep hygiene is not a single intervention. It is the combination of many practices, each of which contributes a small to moderate benefit. People who apply several of these habits together consistently experience substantially better sleep than those applying none. The most impactful starting points for most people are: consistent wake time, morning light, bedroom temperature, and caffeine cutoff. Building from these foundations and adding the remaining practices over time is a reliable path to significantly improved sleep quality.