A woman I trained with had been a clown, touring Europe with a circus. The first thing they teach you at clown school is to walk out, look up, look round at the faces, and pause before you begin. A founder I worked with used to go blank in pitch meetings because she cared too much about the outcome, and what she found to take into the room with her came out of a yoga class. This is about doing the confident thing before you feel confident.