Here are eight common reasons you’re waking up, plus what you can do to get a good night’s rest, according to Self.

One minute you’re snoozing peacefully, the next you’re wide awake in the dead of night. Sound familiar? Unless you’re blessed enough to conk out like the most determined of logs, you may have experienced this form of sleeplessness before. Waking up during the night isn’t uncommon—a study of 8,937 people in Sleep Medicine estimates that about a third of American adults wake up in the night at least three times a week, and over 40 percent of that group might have trouble falling asleep again (this is sometimes referred to as sleep maintenance insomnia).

So, what’s causing you to wake up in the middle of the night, and how can you stop it from happening?