I used to be really motivated because I had bad self esteem (I still do but not as bad). I used to think that I'm not good enough as a person and that motivated me to do a lot of things such as going to the gym, learning how to fix cars, surfs, building things etc. I remember working out 6 days a week, 2 hour per session and gained about 20lbs of muscle. Basically I felt like I have no value so I try to make up for it by learning different things, trying to "out do" and impress other people. Over the last year, my self esteem got a lot better due to being awareness of my problem and reading self help books. Now that I'm comfortable with myself, sometime I don't see reasons to do anything. Since I'm comfortable with myself, why work out to impress the chicks :) ? Why do anything since I'm satisfied with who I am? Because of this sometime I just sit around and waste time. Being content with myself has the side effect of not being motivated to do things.