Too much water
Drinking water is essential. The problem is that it is not the best thing to do before going to bed. If you drink a lot, then you probably need to get up in the middle of the night to use your bathroom. To avoid this kind of problem is pretty simple. Drink your water throughout the day. Before going to bed go to the bathroom first even if you think you do not need to. If you get thirsty in the night, keep a very small glass of water by your bed. Although it is advisable sooner or later to get rid of this habit too.