1. Rosie Perez, actress
"My sister, who's a chef, taught me how to make tea with dried chamomile flowers by letting them steep for an entire day. It's a powerful but natural sleeping aid. I always drink a cup before bed."
2. Jillian Michaels, cohost, The Doctors
"Books on tape are like bedtime stories for adults. My favorite is Parallel Worlds
, by Michio Kaku, a theoretical physicist. And if I wake up in the middle of the night, I recite the alphabet backward."
3. Danica Patrick, racecar driver
"There's nothing better than wintertime sleep that feels like hibernation, so I always make the room a few degrees cooler before bed. My surroundings also have to be really dark. I even cover my digital clock."
4. David Gregory, moderator, Meet the Press
"I used to pop up in the middle of the night, worried that I'd overslept. So now I set two or three alarms. Knowing I'm going to wake up on time helps me sleep soundly."
Dr. Oz's 28-Day plan to renew your body, mind and soul