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Don't: Take a Hot Bath
It's true that a warm soak can help you fall asleep, but not if you're climbing out of the water immediately before climbing into bed. Here's why: Your body temperature dips at night, starting at around two hours before sleep. A hot bath causes your temperature to rise and then cool down afterward, which will help you relax. It's this drop in body temperature that knocks you out, and the steeper the drop, the deeper you'll sleep.
Do: Pay attention to timing, which is key. Bathe too close to bed and your temperature will stay elevated, keeping you on high alert. Make sure you're toweling off at least an hour before turning in.