Most people think success comes from good luck or enormous talent, but many successful people achieve their accomplishments in a much more mundane way: through self-discipline.
Brian Tracy knows this firsthand: He didn't graduate from high school, and after working for a few years as a laborer, he realized he had limited skills and a limited future. But through the power of self-discipline, he changed his life, achieving success in sales and marketing, investing, real estate development, and management consulting.
