Essentially, when your brain is finally given a moment of a rest, those subconscious thoughts can bubble up to the surface and keep you awake. Unfortunately, you can’t simply switch your brain off just so you can get some sleep. To really avoid those restless nights the best thing you can do is get better sleep and train yourself to fall asleep quicker. If all else fails, a little math might at least direct that consciousness spotlight onto something more mundane.