Research proves that belonging to a Twelve Step Fellowship group increases the chances of long-term recovery from addictions and is also helpful with treating compulsive behaviors and mental health disorders. Twelve Step Facilitation (TSF) is an evidence-based approach that together with active involvement in a Twelve Step group helps individuals succeed as they move from treatment into recovery. Listed on SAMHSA's National Registry of Evidence-based Programs and Practices (NREPP), the Twelve Step Facilitation program, which includes Twelve Step Facilitation Handbook, is an invaluable resource for understanding the effectiveness of the Twelve Steps and showing the importance of outcome-based treatment in modern health care. Beginning with a history of Project MATCH, this handbook introduces the scientific basis for TSF and goes on to highlight new research, describe the program's theoretical applications, and explain new features included in this second edition. Includes: Explanation of revised session topics Advice for common misconceptions about TSF Guidance on volunteer- and peer-led facilitation Recommendations for individual and group administration Applications for all substance use disorders and compulsive behavior