Instructions for self-treatment, whether printed, presented via computer or by audiovisual means, are effective in the management of phobias, panic disorder, other anxieties, depression, bulimia nervosa, obesity, alcohol problems, nicotine abuse, myocardial infarction, AIDS, compliance problems and the counseling of patients' relatives. A lasting improvement has been shown for up to 7 years. The mechanisms of effective self-change are discussed.