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Don’t drink any alcohol, period—and if you absolutely, positively must, limit yourself to one drink before about 6 p.m. Alcohol probably impairs sleep quality more than any other factor we can control. Don’t confuse the drowsiness it produces with quality sleep. Don’t eat anything less than three hours before bedtime—and ideally longer. It’s best to go to bed with just a little bit of hunger (although being ravenous can be distracting.) Abstain from stimulating electronics, beginning two hours before bed. Try to avoid anything involving a screen if you’re having trouble falling asleep. If you must, use a setting that reduces the blue light from your screen. For at least one hour before bed, if not more, avoid doing anything that is anxiety-producing or stimulating, such as reading work email or, God help you, checking social media. These get the ruminative, worry-prone areas of our brain humming, which is not what you want. For folks who have access, spend time in a sauna or hot tub prior to bed. Once you get into the cool bed, your lowering body temperature will signal to your brain that it’s time to sleep. (A hot bath or shower works too.) The room should be cool, ideally in the midsixties. The bed should be cool too. Use a “cool” mattress or one of the many bed-cooling devices out there. These are also great tools for couples who prefer different temperatures at night, since both sides of the mattress can be controlled individually. Darken the room completely. Make it dark enough that you can’t see your hand in front of your face with your eyes open, if possible. If that is not achievable, use an eye shade. I use a silky one called Alaska Bear that costs about $8 and works better than the fancier versions I’ve tried. Give yourself enough time to sleep—what sleep scientists call a sleep opportunity. This means going to bed at least eight hours before you need to wake up, preferably nine. If you don’t even give yourself a chance to get adequate sleep, then the rest of this chapter is moot. Fix your wake-up time—and don’t deviate from it, even on weekends. If you need flexibility, you can vary your bedtime, but make it a priority to budget for at least eight hours in bed each night. Don’t obsess over your sleep, especially if you’re having problems. If you need an alarm clock, make sure it’s turned away from you so you can’t see the numbers. Clock-watching makes it harder to fall asleep. And if you find yourself worrying about poor sleep scores, give yourself a break from your sleep tracker.
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