Dr. Zinsser, an expert in the psychology of human performance, talks about how to stop history repeating itself; if you failed at something in the past, how to be confident that it won’t happen like that in the future. He tells us that to be confident, it does not mean you have to be obnoxious. And he discusses how to be confident even when you do not yet have validation that you can do it.
You can find Dr. Zinsser’s book, The Confident Mind, here.