Sleep affects nearly everything: mood, memory, immune health and even appetite. Most adults need around seven to nine hours a night, yet many people regularly get less. The good news is that a few simple habits make a real difference.

Keep a consistent schedule

Your body runs on an internal clock. Going to bed and waking up at roughly the same time every day, including weekends, helps that clock stay steady. Over time, falling asleep becomes easier.

Use light to your advantage

Morning daylight tells your brain it is time to be awake. Try to get outside, even briefly, early in the day. In the evening, dim the lights and reduce bright screen use in the hour before bed.

Make your bedroom sleep-friendly

• Cool: a slightly cool room usually helps people sleep better.
• Dark: use curtains or an eye mask to block light.
• Quiet: earplugs or a fan can mask background noise.

Watch caffeine and late meals

Caffeine can stay in your system for many hours. Many people sleep better when they avoid coffee and energy drinks after early afternoon. Large, heavy meals right before bed can also disturb sleep.

The best sleep routine is the one you can follow every night, not the perfect one you follow once.

Build a wind-down routine

Reading, light stretching, a warm shower or writing down tomorrow's to-do list can signal to your body that the day is ending. Keep it simple and repeat it nightly.

If you cannot sleep

Lying awake for a long time can make the bed feel stressful. If you are still awake after about 20 minutes, get up, do something calm in dim light, and return when you feel sleepy.

If sleep problems continue for weeks, or you snore loudly and feel exhausted during the day, talk to a doctor. Conditions like sleep apnea are common and treatable.