About For The Press Manifesto Book Tour Contact Manifesto I work hard to identify my core beliefs about habits and happiness. Here are some of my key principles. My Habits Manifesto Better Than Before, Distilled in 21 Sentences Secrets of Adulthood for Habits My Twelve Personal Commandments The overarching principles by which I try to live my life. The Eight Splendid Truths Eight core principles of happiness (writing about happiness has given me a passion for making numbered lists). What Started Me Thinking When I started thinking about happiness, several quotes made a special impression. Happiness Theories I Reject Several venerable thinkers and I disagree, apparently. Some Paradoxes of Happiness Paradoxes abound in the study of happiness.