Consuming stimulants such as caffeine in the evening makes it harder to fall asleep. Stimulants also prevent deep sleep and increase nighttime awakenings. Sleep on a good bed. It's difficult to get deep, restful sleep on a mattress that's too small, too soft, too hard or too old. It won't provide the comfort and support you need to rest well.
Smokers take longer to fall asleep, awaken more often and spend less time in deep sleep.
Drink only in moderation. Drinking alcohol before bed makes it difficult to fall asleep, interrupts the sleep stages and causes awakenings in the early-morning hours. Unwind early in the evening. Try to deal with worries and distractions before going to bed. Don't go to bed stuffed or starved.