Until now, the explosion of methods for changing behavior has been a hodgepodge of author-centric noise. Reading all of the books, blogs, and blowhards can leave one confused by their seemingly conflicting advice. Pundits push their methods as cure-alls. For example, some argue that earning badges and leveling-up can inspire the clinically obese to become slim again. They can’t. Others claim that being good at anything requires strict goal setting and performance objectives. It doesn’t. The goal of this article is to help you identify which technique could be most effective for each type of behavior change.