This book is a clinical guide to using routine outcome monitoring and feedback to prevent and address patient deterioration over the course of treatment. It examines the benefits of monitoring patients’ progress and providing feedback to practitioners, a a low cost, simple intervention that improves care and reduces the number of treatment failures. Progress feedback uses standardized measures to routinely evaluate treatment progress regularly throughout treatment, and helps the practitioner decide whether adaptations in the treatment approach are necessary. Chapters include case materials and detailed descriptions of how to use different feedback systems in clinical practice. This enhances practitioner judgment regarding which system is the most appropriate for each individual case. This invaluable guide provides practitioners with ways to address treatment non-response and intervene in time before a failing situation becomes treatment failure.