Take a walk everyday between noon and 1 p.m. Even if it’s a quick stroll around the block, here’s why, “Around 1 p.m. there’s a natural lull in you circadian rhythm that signals the body to release melatonin, which makes you drowsy,” says sleep expert Michael Breus. You can prevent that dip by exposing your body to 10 minutes of sunlight at noon. See you outdoors at 1p.m.