One of the keys to success is passion. If you care about something or want it naturally you won't need to force yourself to work on it. The passion will be your fuel. Only work on things you are passionate about.
I used to practice gymnastics when I was younger. I still enjoy watching them, especially at the Olympics. That's heaven for me :) This is Nadia Comaneci, the first gymnast to achieve a perfect 10 in an Olympic gymnastic event.