Good news for people who can't focus at work (a.k.a. everyone). The key to being more productive may be as simple as taking a nap. As this video from The Science of Us explains, we shouldn't be working for more than 90 minutes at a time. (This is basically your ticket to go check Facebook and not feel bad about it.) And taking hour-long naps in the middle of the day made people in one study less frustrated and impulsive. Check out the video for more science-backed reasons why a midday snooze can help you crush your next project.