Human behavior is completely predictable. People always act consistent with the way they view themselves. People who see themselves as thieves, steal. Folks who consider themselves liars, lie. You tell me how you think of yourself, and I will predict your actions and decisions. Conversely, if you change the way you see yourself, you will change your behavior consistent with this new self-understanding.
If you know who you are, you know how to act.
And how would you like to alter the way you see yourself? Here's how: by interrupting your negative self-talk - the negative internal conversation you have with yourself about yourself - and substituting positive confessions.
In other words, when you mess up, instead of saying to yourself, "You stupid idiot!" you say to yourself, "Stay calm. The world is not going to end. Everything is going to be all right."