Do you get enough sleep? If not, you're not only hindering your health, but you're decreasing your life expectancy and also not giving your cells enough time to regenerate. That's right, years schmears, we know that you really care about not looking puffy when that cute barrista hands over your nonfat latte. When you do get to fantasize about that cuppa hottie, you'll want to be well rested in order to enjoy it. According to Self's "31 Days to Great Sex" feature, getting an adequate amount of sleep is crucial to cultivating desire. Which makes sense, because who has energy to get your freak on when you're exhausted? Not us.