ანოტაცია: Top professional speaker and sales trainer Brian Tracy found that his most important breakthrough was the discovery that it is the "psychology of selling" that is more important than the techniques and methods of selling. Learn how to double and triple your sales in any market. It's a promise of prosperity that sales guru Brian Tracy has seen fulfilled again and again. More salespeople have become millionaires by listening to and applying his ideas than from any other sales training process ever