Brian Tracy is one of America's leading authorities on human potential, personal effectiveness and sales. The head of two companies, he has consulted with more than 500 corporations worldwide. He has had successful careers in sales and marketing, real estate development, importation, distribution, and management consulting. His extensive knowledge in these areas has led to the creation several books and numerous bestselling audio cassette programs, including The Psychology of Achievement and The Universal Laws of Success and Achievement. A dynamic speaker, he has motivated thousands of people toward peak performance and high achievement.