body is used to.
get some exercise: try to get 20 to 30 minutes of exercise no sooner than 6 hours before bedtime- any exercise just before bed may cause you not to sleep that well.
avoid caffeine and alcohol. avoid things that contain any caffeine such as coffee, soda pop, teas, and candy. the same goes for people that drink alcohol just before going to bed.
avoid drinking too many liquids. waking up at night to go to the bathroom becomes a bigger problem as we age. by not drinking anything an hour before sleep and going to the bathroom several times as you get ready for bed, you can reduce the 