Earn the right to be proud and confident. Don't measure yourself by what you have accomplished, but by what you should have accomplished with your ability. Discipline yourself, and others wont need to. It isn't what you do, but how you do it. It's the little details that are vital.
Little things make big things happen.
Although I wanted my players to work to win, I tried to convince them they had always won when they had done their best. If you lose self-control everything will fall. You cannot function physically or mentally or in any other way unless your emotions are under control. Things turn out best for the people who make the best of the way things turn out.