The Compound Effect by Darren Hardy is one of the most impactful books I've read by one of the world's most influential success media leaders. Hardy is an international bestselling author and one of the most well known and highly regarded experts on motivation and success strategies, with millions of books sold and countless appearances to share his knowledge. In The Compound Effect, he details the 'core principles that drive success' and the strategies to create and sustain momentum in your personal and professional life. Using the 'pump the well' analogy, Hardy emphasizes the importance of maintaining your momentum and not giving up when you're discouraged and not giving in to the temptation to slack off.