Even in my crazy little world of exercise, where I have the passion - yes, I am one of those weird people that actually enjoys working out - I sometimes have days where I would rather sit on the couch with a book than move my butt. It's those days that you really push to the next level. Anyone can do something if it's easy: it's those who actually push beyond the comfort zone and make themselves go beyond what they feel like doing, who get better and progress in any given area.