Generally, for people not to suffer with sleep disorders such as Insomnia, it is advised that they:

Develop a regular sleeping time at night and also a fixed time for waking up each morning. Naps should be avoided because they tend to rob one of night sleep.

Do not consume anything with caffeine of nicotine; these are stimulants that will keep one awake for hours after they are consumed. Alcohol too is another agent that disrupts sleep.

Exercise regularly but not before bed time. This is because exercise tends to pump one up, and keeps the blood pressure higher. It is recommended that one should not exercise within 3 hours before bed time.

Should not eat a heavy dinner or anytime near sleeping time. This is because until the food is digested properly the body cannot rest properly. The activity of digestion is enough to disturb a person, especially if she/he is already having a problem sleeping. As opposed to avoiding heavy meals before sleep, it is recommended that one consume something light before bedtime. This helps one to get some sleep.