This description of a weight reduction program, based on generalizations derived from eight years of work with overweight persons, discusses the clients' rationalization of overeating behaviors. In this behavior modification program, the client is required to permanently give up one high calorie food and to write down all foods eaten before actual consumption occurs. Methods for giving up foods, substituting low calorie foods, and keeping a food ledger are presented. Program forms, provided in the appendix, are explained in the text. The initial intake interview with the client is described in detail as a strategy for determining the client's behavior motivation and present eating habits. A follow-up evaluation is also discussed, in which 32 of 38 former clients weighed less at the follow-up than at their entry point into the program. (NRB)