Turn your thoughts to light and cheerful matters. Use light bed clothes and relax. Do not lie on your back, but on your side with one or both knees brought well up and the head and shoulders slightly forward. The position of the arms and legs should be changed frequently. A healthy sleeper usually shifts from one side to the other several times in the course of the night.
Controlled breathing is also a great help in inducing sleep.
The method is to lie on your side in bed and then take three deep breaths, expanding the abdomen completely. Then hold your breath as long as you can. Next, take three more breaths and repeat the breath-holding. While you hold your breath, carbon dioxide accumulates in the body and induces natural sleep. Regular active exercise during the day and mild exercise at bedtime enhances the quantity and the quality of sleep.