"Better Than Before" is a book by Gretchen Rubin that explores the science of habit formation and how to create lasting change in our lives. Rubin identifies different strategies that people can use to build good habits and break bad ones, emphasizing that understanding our own tendencies is key to success. The book categorizes individuals into four personality types, known as the Four Tendencies: Upholders, Questioners, Obligers, and Rebels. By recognizing which type we belong to, we can tailor our approaches to habit change, making it easier to achieve our goals and improve our daily routines.