As an athlete if you have any negative thoughts its hard to be successful at what you want to accomplish.
You have to have a positive attitude to strive. Positive Coaching Alliance talks about filling your emotional tank. Which means positive attitude trumps negative thoughts. Coach your athletes with positive sayings. Negative talk just beats kids down we want to build them up.
Everyone makes mistakes teach in a way that shows players or athletes that you can recover from them and still succeed.
-- Use things like its OK get the next one. -- Shake it off and keep shooting the ball.
-- Or you will lift that the next time you are in the gym.
-- The next sale is all you!
Doesn't matter what you are doing or what sport, job, class whatever a positive attitude will get you further then negative thoughts.