Gretchen Rubin is one of the most thought-provoking and influential writers on habits and happiness. Her book, 'Better than Before' is about how we change our habits. 'The Happiness Project' and 'Happier at Home' were both instant bestsellers, and 'The Happiness Project' spent more than two years on the bestseller list, including at #1. She has a popular podcast, Happier with Gretchen Rubin. Follow her on Twitter @gretchenrubin.