The most important thing that is going to keep you coming back for more, is keeping your workout interesting and fun.  This means changing your workout every 3-4 weeks, which you should be doing anyway.  This creates muscle confusion, which will help you keep gaining new grounds and not hitting a plateau as most do with their workouts.    Things I have found that keep me coming back for more.  1) Every couple of months, go try out a new health club.  Pay the drop in fee and get into it!...