Keep an irregular sleep schedule
Drink caffeine late in the day
Use nicotine close to bedtime
Take long or late naps
Use screens right before bed
Stay in a bright or noisy environment at night
Exercise intensely late in the evening
Eat heavy meals or spicy food before bed
Drink alcohol near bedtime
Go to bed at inconsistent times
Stay in bed while unable to sleep
Worry or ruminate in bed
Make the bedroom too hot or too cold
Use your bed for work or stressful activities
Sleep on an uncomfortable mattress or pillow