About one-third of Americans aren't getting the right amount of shut-eye on a daily basis - but how many hours should you really be getting? Can you make up for poor sleep with a nap? How can you fall asleep - and stay asleep? Dr. Michael Grandner, Director of the UArizona Sleep and Health Research Program and Director of the Behavioral Sleep Medicine Clinic at the Banner-University Medical Center, gives us the secrets to a better night's sleep. The professor of several disciplines also tells us why good sleep is not just important for our mood, but it's essential to promoting cardiovascular health, as well as preventing obesity and diabetes.

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