If you’re having trouble falling asleep, you’re in good company. An estimated 65% of Americans said they encounter sleep problems a few nights each week, according to a recent study by the National Sleep Foundation. Sleeping too little is linked with an increased risk for obesity and depression. But before you reach for a sleep aid from the nearest pharmacy, it’s worth reexamining your nighttime routine. Some of your favorite evening rituals could be responsible for that tossing and turning.