Positive psychologists work to identify cultural practices from across the world that contribute to the good life (Peterson, 2006). Research frequently finds that religious engagement is positively correlated to well-being. The mechanisms by which religion influences well-being, however, are not fully understood and may vary widely by faith. This paper focuses on members of The Church of Jesus Christ of Latter-day Saints (“Latter-day Saints" or "Mormons") who report particularly high well-being—some of the highest well-being of any religious group in America (Newport, Witters, & Agrawal, 2012a). Through the lens of positive psychology, I explore how Latter-day Saint (LDS) practices and teachings may foster well-being. By analyzing similarities between well-being theories and LDS doctrine and behavior, I identify five possible mechanisms through which Mormonism might increase well-being, including fostering prosocial behavior, a focus on family, purpose and meaning, autonomy and agency, and physical health. I also identify areas in which Latter-day Saints struggle and how they might use well-being research to improve their level of flourishing. This investigation suggests that studying Latter-day Saints can (1) provide insight about the benefits and possible harm of certain well-being interventions in real-life application and (2) offer new practical well-being interventions that could be empirically tested. In sum, I propose that the study of Latter-day Saints could increase our understanding of how religion influences well-being and how well-being is cultivated.