The Transtheoretical Model (TTM)-Based Stress Management Program targets adults who have not been practicing effective stress management for 6 months or longer. TTM is a theory of behavior change that can be applied to single, multiple, and complex behavioral targets. TTM’s premise is that behavior change is a process and that as a person attempts to change a behavior, he or she moves through five stages: precontemplation (not intending to begin in the next 6 months), contemplation (intending to begin in the next 6 months), preparation (intending to begin in the next 30 days), action (practicing the behavior for less than 6 months), and maintenance (practicing the behavior for at least 6 months). This application of TTM to stress management focuses on increased regular relaxation, exercise, and social support activities. The intervention helps participants develop new strategies that can promote progress to the next stage of change in the adoption of effective stress management practices. The program uses a computerized expert system to provide individualized feedback reports on stress management behaviors at the beginning of the intervention and 3 and 6 months afterward. Participants receive feedback about themselves compared with their peers that includes stage of change, processes of change, self-efficacy, decisional balance responses, and their use of stress management behaviors. Because the intervention uses a self-directed computer program, no training is needed for implementation. A user manual provides answers to frequently asked questions, instructions on how to extract data, and technical support.