Rigorously field-tested by on-the-ground clinicians, this guidebook provides an easy-to-use, evidence-based summary of using MI to treat dual disorders, generally substance abuse and another disorder, like depression or anxiety. MI is a counseling approach that works to facilitate and engage intrinsic motivation within clients to bring about behavior change. This concise guide-one of five in the "Psychotherapy Essentials To Go" series-lays out the basics of MI so any clinician can implement it with their clients. Self-questionnaires, case studies, role play transcripts, diagrams, exercises, and worksheets make it easy for front-line case workers and therapists of all kinds to learn the fundamentals of this treatment modality and put it to use immediately.