The basics of staying healthy seem pretty easy to follow: Eat well, exercise, get enough sleep and you should be on the right track, right? Surprisingly, it can be more complicated than that. Oftentimes the very choices we make to benefit our health can be the same ones that hurt us in the long run. Read on to learn which unexpected habits—like brushing your teeth after every meal or slipping into a pair of comfortable sandals—might be causing you harm.