A great deal of literature concerning work, play and job satisfaction is summarized and integrated. The author discusses a number of different conceptions of what work actually is and concludes that, according to all definitions, work is an instrumental activity with only extrinsic satisfactions. It is his contention, however, that work may have intrinsically rewarding aspects. Play is viewed very broadly as: (1) intrinsically rewarding; (2) an activity which includes information search, skill training, and repetitious practice; and (3) a form of learning and rehearsal. The author prefers not to see work and play as mutually exclusive activities, but to view them as complementary components of all activities. On this basis, a model for vocational counseling is proposed, which seeks to evaluate jobs on the relative degrees of extrinsic and intrinsic satisfaction which they can provide, and to determine which individuals would "fit" with what kinds of jobs, utilizing the extrinsic/intrinsic satisfaction dimensions. (TL)