 Of course, exercise is by no means a cure for insomnia, and you might need to talk to your doctor if you can't find a way to get better rest on your own. But if you want to give exercise a shot, just get moving. You don't need to do this big, intense workout. Just get outside. Go for a walk. As an added bonus, the exposure to sunlight will probably help keep your circadian rhythms in check as well. Sweet dreams. I'm Dr. Sanjay Gupta, helping you live a better life.