13 Things Mentally Strong People Don’t Do is a internationally acclaimed self-improvement book written by psychotherapist and licensed clinical social worker Amy Morin. Expanding on a viral blog post she wrote following personal grief, Morin presents a practical framework for building mental toughness by focusing on what to avoid rather than just what to do.

The book emphasizes that developing mental strength requires a three-pronged approach: managing thoughts, controlling emotions, and taking productive actions.