You always have to prepare for the obstacles that are going to come. Consequently, when they do come, it doesn't affect you mentally near as much as when you're unprepared for them.
Winners embrace hard work. They love the discipline of it, the trade-off they're making to win. Losers, on the other hand, see it as punishment. And that's the difference.
You've got to have great athletes to win, I don't care who the coach is. You can't win without good athletes but you can lose with them. This is where coaching makes the difference.