It’s not just toddlers who benefit from some sleep in the middle of the day. A new study has found that grown-ups facing a frustrating task were much more likely to attempt it with persistence, focus and determination after taking an hourlong nap. Those who took on the task without napping first gave up sooner, and exhibited more impulsive behavior. It’s no wonder, then, that the famously perseverant Thomas Edison, John F. Kennedy, and Ronald Reagan all depended upon a daily dose of sunlit shuteye. If you find yourself dragging during the day but don’t have time to lie down, there are some other options. Take a brisk walk outside to get your blood pumping, eat a healthy snack to boost your blood sugar, or sniff an invigorating essential oil such as eucalyptus, grapefruit, or peppermint. What do you do when you need a nap? Share your tips in the comments.