Take care of your ..........

Feet! Keep an eye on how your shoes wear. Ask someone(like a good personal trainer or physical therapist) to look at your Achilles to make sure it runs vertically up your leg. All of this will give you a clue as to whether or not you have a proper heal strike. If you have questions ASK someone. If you develop problems with your feet, which is a very common thing, it's going to screw up the entire kinetic chain.