You've done it. I've done it. Everyone has done this at some point. Do you remember the woman wearing the business suit, who walked into the store with such an air of confidence that you were sure she must be the owner? At the time, you thought, "I wish I could be that successful and confident." Then, there was the time you saw the man at the park, with a bunch of kids. They were all laughing, playing, having a wonderful time, and enjoying life to...