get up the gym- if you cant be arsed with that chances are you wont bother with anything if your not interested in it, most people start of at the gym and find it a chore but if you get into it you cant get enough of it due to the buzz and feeling you gain from doing exersize (namedly testosterone increase) but also fitness and believe it or not you tend to have more energy once you exercise! or alternativly people want the result but dont enjoy the gym so never keep it up. other than that my friend i would say ride more? or find a sport that you are interested (join a boxing, kickboxing etc... club) in this way you will stick to it? hope this helps