If you have a massage ball like this, it can help you go to sleep at night. It is made of soft rubber. I believe it is available in malls.

When in bed, place the ball on your pillow and secure it between the top of your head and your headboard, so that the rubber spikes press lightly on your scalp. Close your eyes, focus on the pressure, visualize a still object or scene, and then make your mind hang like a frozen computer screen.