One of my college professors described one of my fellow students as a person who made his own luck. I always wondered what he meant by that. But I think that it was a case of the kid knowing what he wanted and going after it. He had perseverance.
That's a trait that entrepreneurs have to have. They must believe in themselves and their goal. They don't give up. The Wall Street Journal just ran an article on perseverance and personal health. There's a link in my sidebar. Take a look.