Summarize the following:
Work, games, and most other activities should be done at a table or desk instead of on the bed, and in another room whenever possible. Training yourself to associate the bed with sleep or calm bedtime activities can help trigger falling asleep more consistently. A way to wind down each night puts you in the right frame of mind for sleeping, especially if you repeat the same ritual every time. If lying awake in bed causes anxiety or fear, this is especially important. Try the following ideas:  Read a calm book. Listen to a book on tape or a podcast, with your eyes closed. If this keeps you up, listen to nature sounds instead. Eat a small snack if you tend to wake up hungry, such as a glass of milk, a banana, or a small bowl of low-sugar cereal. Exercising is a great idea, as long as you don't wake yourself up with a workout right before bed. Exhausting yourself to extreme fatigue will not produce restful sleep, but some form of physical activity is often a necessity to help you stick to a daily sleep schedule. As mentioned above, your body slows down as it starts to sleep, including your metabolism. If you eat a heavy meal before bedtime, your slowed metabolism could keep you uncomfortably full – or return to "active mode" and produce unwanted energy.

Summary:
Use your bed only for bedtime. Have a bedtime ritual. Exercise earlier in the day. Finish the day with a light meal.