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Doctors say it's important to look at your lifestyle-too much caffeine, too little exercise, or too much late-night work or TV. If lifestyle changes aren't enough, medications can help. But supplements may also help provide a peaceful night's sleep.

People have used chamomile tea for sleep for thousands of years. Studies seem to back up its calming effect. One Japanese study of rats found that chamomile extract helped the rats fall to sleep just as quickly as rats that got a dose of benzodiazepine (a tranquilizing medication). Better research of chamomile is needed, experts agree. The FDA considers chamomile tea to be safe with usually no side effects.

Melatonin is a natural hormone that helps regulate the sleep-wake cycle (circadian cycles). Studies show that melatonin not only helps some people fall asleep, but also enhances the quality of sleep. Melatonin comes in two forms-extended release and immediate release. If you tend to wake up in the middle of the night, you may want to take extended release before you go to bed. If you have trouble falling asleep, try immediate release.