This chapter discusses the concept of intrinsic motivation. It also discusses a concept, known as self-determination theory (SDT), developed by Edward Deci and Richard Ryan, and its connection to intrinsic motivation. The chapter explains how intrinsic motivation is the key element in both creative behavior and engagement. It explores the Big Question of “How can managers and supervisors motivate their workers?” Motivation is that force which drives behavior. Psychologists have created terms for the motivation that drives behavior depending upon the location of the apparent reward, and the location is always relative to the individual. Central to SDT is the concept of autonomous motivation, that is, self-determination. Autonomous motivation is acting with volition, a sense of personal control and choice. SDT posits that autonomous motivation is typically associated only with intrinsic motivation, integrated regulation and sometimes identified regulation. All else is controlled motivation and largely driven by extrinsic factors.