I know you've heard it a thousand times before. But it's true - hard work pays off. If you want to be good you have to practice practice practice. If you don't love something then don't do it.
If my kids are doing well then my life is going pretty well. And if my kids aren't doing well it doesn't matter how the other elements of my life are. It's kind of amazing to have a context like that. This is really wonderful.