An important part of every manager's job is changing people's behavior: improving someone's performance, helping them better manage relationships with colleagues, or sometimes even stopping them doing something. Yet, despite the fact that changing people's behavior is such a fundamental skill for managers, there is little in the way of systematic support for them to go about it.This book changes that, revealing simple but powerful techniques for changing behavior that experts from a range of disciplines have been using for years. Drawing upon proven methods from psychology, psychotherapy, and behavioural economics, it presents a comprehensive toolkit that managers can use to improve the performance of staff and address some of the most common challenges they face.