Character is more important than any other leadership trait.
Never lie; never cheat; never steal. Don't whine; don't complain; don't make excuses.
Failure is not the crime. Low aim is.
Constantly be aware and observing. Always seek to improve yourself and the team.
The purpose is to help, to prevent, to correct, to improve, rather than to punish. Criticism is not meant to punish, but rather to correct something that is preventing better results. The only goal is improvement.
Adversity often produces an unexpected opportunity. Look for it ! Appreciate and utilize it! This is difficult to do if you're feeling sorry for yourself because you're faced with adversity.