From the moment you wake up, your body starts to prepare for sleep. We show you how to adjust your daytime habits to get the best possible night of rest. Here's what to remember: - Start the day with natural light — from an east-facing window, or even better, go outside — to put the brakes on melatonin. - Cut the caffeine off by late morning. Even if it doesn't keep you up, caffeine impacts how much deep sleep you're getting. - Get moving during the day. Exercise can increase the quantity and quality of your sleep. - Avoid the nightcap. Alcohol makes you feel sleepy but disrupts deep sleep. - Ban the smartphone and TV from the bedroom. Too stimulating, when you should be letting go.