Unsupervised do-it-yourself therapy constitutes an exceptionally important issue that calls for more empirical and scientific investigation of the validity of publications in this field. Rational-emotive therapy (RET), one of the most popular forms of self-help treatment, has led to several generalizations. (1) Cognitive and cognitive-behavior therapies have been very widely used as modes of unsupervised self-help treatment for thousands of years. (2) Many people are quite capable of significantly changing their personalities and behavior by self-help therapies, and are able to do so when this therapy is supervised, lightly supervised, or entirely unsupervised. (3) Some people can help themselves to change their personalaties and behavior more effectively and extensively by unsupervised cognitive self-help therapies. (4) More people will help themselves through cognitive and cognitive-behavior therapy when they are supervised by a professional therapist. (5) A highly cognitive and philosophically-oriented self-help therapy, such as RET, will help people significantly more than will less philosophically-oriented therapies. (Author)