Gretchen Rubin is one of the most thought-provoking and influential writers on habits and happiness. Through her bestselling books (The Happiness Project, Happier at Home, Better Than Before, The Four Tendencies, Outer Order, Inner Calm), and award-winning podcast Happier with Gretchen Rubin, she shares insights, strategies, stories, and tips that help people create happier lives. Her books have sold more than 3.4 million copies, in 30 languages. More than 2 million people have taken her Four Tendencies quiz to find out if they are Upholders, Questioners, Obligers, or Rebels—and why it matters. Here, she talks about test-driving ideas from contemporary science and ancient wisdom about building good habits and having a happier life.