Being unable to sleep is disconcerting, and the problem only compounds the more you think and stress about it. There's being unable to fall asleep; then there's waking up in the middle of the night; and then there's waking up too early—all of which suck equally. However there are some common—and easily avoidable—culprits that could be to blame for your sleepless nights. Keep scrolling to learn what they are, so you can finally rest easy.