We’ve all been there: You fall asleep just fine after a long day of work, but at around 2 a.m., something happens. While most people associate insomnia with the inability to fall asleep in the first place, it also applies to people who find themselves unable to fall back to sleep after waking up in the middle of the night. Though some severe cases may prompt a visit to the doctor, the occasional occurrence can be helped with these five science-backed tips. When you’re trying to fall back to sleep in the middle of the night, one of the biggest obstacles in your way is light. In fact, don’t worry at all about the time when you’re trying to fall back to sleep, because it’s only going to increase your stress.