Crisis intervention is one of the major challenges in psychiatric work. Especially outpatient facilities must respond to people in crisis to quickly de-escalate situations. But where do staff members find the confidence for their decisions? When is an intervention helpful? This book provides guidance. In most psychiatric and psychosocial institutions, dealing with mental crises and aggressive or suicidal behavior is a constant topic. It is essential for all staff members to be able to respond confidently to crises and take appropriate measures. This book focuses on early, appropriate, and systematic responses. It demonstrates how and at what points in a crisis trajectory one can intervene. Step-by-step procedures are presented, as well as collaboration with other services.