Activator–behavior–consequence (ABC) model can be used to diagnose the contributing factors to an incident or at-risk behavior and to decide on a plan for corrective action. This chapter discusses the Intervention design and implementation to improve safety-related behavior. Intervention occurs before desired or undesired behavior to direct potential performers. Based on rigorous behavioral science research and backed by real-world examples, six principles for maximizing effective activators were given: Specify behavior, Maintain salience with novelty, Vary the message, Involve the target audience, Activate close to response opportunity and Implicate consequences. Consequences motivated employees to create safety slogans, and the most influential activators usually made reference to consequences. Activators that signal the availability of a consequence are either incentives or disincentives. An incentive announces to an individual or group, in written or oral form, the availability of a reward. In contrast, a disincentive is an activator announcing or signaling the possibility of receiving a penalty.