Your personal habits
Fix a bedtime and an awakening time. Do not be one of those people who allows bedtime and awakening time to drift. The body "gets used" to falling asleep at a certain time, but only if this is relatively fixed. Even if you are retired or not working, this is an essential component of good sleeping habits. Stick to schedule even on days off work.
Limit napping during the day. Limit the nap to 30-45 minutes and avoid napping within 4 hours of regular bedtime.
Avoid alcohol 4-6 hours before bedtime. Many people believe that alcohol helps them sleep. While alcohol has an immediate sleep-inducing effect, a few hours later as the alcohol levels in your blood start to fall, there is a stimulant or wake-up effect.
Avoid caffeine 4-6 hours before bedtime. This includes caffeinated beverages such as coffee, tea and many sodas, as well as chocolate, so be careful.
Avoid heavy, spicy, or sugary foods 4-6 hours before bedtime. These can affect your ability to stay asleep.
Exercise regularly, but not right before bed. Regular exercise, particularly in the afternoon, can help deepen sleep. Strenuous exercise within the 2 hours before bedtime, however, can decrease your ability to fall asleep.