The Buzz Behind Caffeine

It Blocks A Chemical That Says Brain Cells Need To Rest

(WebMD) 

Make sure your bedroom is dark, quiet, and cool. Use earplugs or eye shades if needed.

Leave the bedroom if you can't sleep. Go into another room and read or do something relaxing and quiet.

Exercise regularly.

Avoid substances that contain caffeine (such as coffee, tea, soft drinks, or diet pills).

Avoid alcohol and nicotine before bed.

Sources: Brambilla, D. Neuron, April 21, 2005; vol 46: pp 1-9. News release, University of Texas Southwestern Medical Center, Dallas. WebMD Medical News: "More Americans Getting A Caffeine Buzz." WebMD Medical Reference: "Understanding Sleep Problems."