I was lucky enough to know exactly what I wanted to do when I was growing up. I think one of the hardest things to figure out in life is what your calling is, and what truly makes you happy - not what you want to work at, but what you want to do.
I was always a great bundle of energy. As a child, instead of walking, I would run. And so running, which is a pain to a lot of people, was always a pleasure to me because it was so easy.