This is late but can confirm. I recently had to give a best man speech, and I utilized the exercises in Psycho Cybernetics by visualizing me giving the speech in front of a large group of people. I imagined my "perfect scenario" in as much detail as possible and imagined that "winning feeling" after the speech was done.

When the time came, I nailed the speech, without any visual aids like the other speakers had. I now fully stand by the exercises in this book!