This document provides an overview of various psychotherapies used to treat mental illness. It discusses therapies such as psychodynamic therapy, cognitive behavioral therapy, aversion therapy, humanistic therapy, and systemic desensitization. It also covers different types of group therapies, couple therapy, and creative therapies. The document describes how each therapy works, what problems it aims to treat, and its potential benefits. It provides examples to illustrate techniques used in cognitive behavioral therapy and systemic desensitization.