It's always about focusing not on the mistakes but on the lessons learned from them.
If a player's not doing the things he should, put him on the bench. He'll come around.
Make sure that team members know they are working with you, not for you.
There is no great fun, satisfaction, or joy derived from doing something that's easy.
When you are through learning you are through.
You may be better than the rest, but you are not a success until you have made the effort to become the best you can be.