Gretchen Rubin is the New York Times bestselling author of The Happiness Project and Better Than Before. She hosts the immensely popular weekly podcast Happier with Gretchen Rubin. In this episode of Insights at the Edge, Tami Simon talks with Gretchen about the principles detailed in her newest book, The Four Tendencies. They speak on how to discover which of the book's four archetypes you embody—whether you're an Upholder, Rebel, Questioner, or Obliger—as well as the challenges and advantages each type faces. Gretchen and Tami also discuss what it takes to start changing an entrenched habit. Finally, Gretchen explains why it's so important that you keep personal spaces uncluttered. (61 minutes)