This document summarizes key aspects of psychotherapy. It discusses that psychotherapy can involve a few sessions or last for months/years. Therapists can be psychologists, social workers, counselors, nurses, or psychiatrists. Psychotherapy involves a trusting relationship between client and therapist and works through changing beliefs, attitudes, and encouraging new behaviors. Research shows psychotherapy is effective both in controlled settings and realistic settings, improving outcomes and reducing medical costs. While approaches differ, common factors like the therapeutic relationship and instilling hope are important. The future of psychotherapy may involve more cognitive-behavioral, culturally sensitive, and eclectic/integrative approaches.