http://www.sleepfoundation.org/site/c.huIXKjM0IxF/b.2422667/k.D677/Insomnia.htm
Insomnia, which is Latin for "no sleep," is the inability to fall asleep or remain asleep. Insomnia can be a disorder in its own right, but often it is a symptom of some other disease or condition. This document provides a general overview on insomnia along with treatment and coping strategies.