I am not motivated to exercise.

The problem is, I don't have a specified exercise that I wish to do.  I would to do all of them.  I am a procrastinator and I write too much.  It is as if I have too much knowledge, but not enough wisdom to carry them out.  I have asked myself about what types of exercises I should do.  I am not sure if there was any one type of exercise I want to do or what to enjoy.  I have some ideas on what to do, but I have no goals.  That may be the problem.  I know of the benefits but I am not sure if even that has made me even motivated.  I need help.