Another thing, don't let the mountain beat you.

I remember reading this story about a SEAL instructor who talked about the guys who showed up for training who looked like Galileo had carved their bodies out of granite and invariably those guys dropped out. Then, the pudgy kids from rural Oklahoma or Iowa who would not be beat down. They would not quit, even if they weren't as physically gifted.

Morale of the story? Be the pudgy rural kid who doesn't quit. A lot of effort is mental.