Solving bad problems wastes time, money, and mental health. Nat Green, author of Stop Guessing, shares insights from over 20 years of professional problem-solving, presenting nine behaviors to tackle seemingly unsolvable issues. Green criticizes the lack of a structured problem-solving process, noting that most rely on inefficient guesswork. His book offers practical examples, from fixing a garage door to preventing subway breakdowns, desalination, and addressing poverty in sub-Saharan Africa. By adopting these behaviors, readers can move beyond guesswork to effective solutions. Stop guessing and start solving today!