Book excerpt: To achieve at greater levels, it is crucial that we master the forces within our personalities that drive -- and often undermine -- our success. Drawing on his work as a clinical psychologist with thousands of leaders worldwide, Dean Herman provides a precise system for understanding and transforming the self-doubt and other personality elements that block our power and damage our relationships. Overall, we learn a potent, step-by-step framework for true self-mastery -- so that we can elicit from others the responses we need and make our greatest contributions.