This training manual provides guidelines for effective teamwork and work-team maintenance and development. It was designed for use in the Marine Corps Task Analysis program, in which staff members are organized to form a work-team whose continuing performance as an effective team is crucial for success of the project. Chapter 1, the major portion of the manual, begins with an explanation of the major obstacles to optimal team performance. Methods using the tool of intervention for diagnosing problems in work-teams are described, with an explanation of such specific techniques as goal-setting, action planning, the organization mirror, force analysis, and business games. Chapter 1 also outlines methods and techniques for achieving organizational change and improvement, with special attention to conflict resolution, role reversal, and team development. Chapter 2 explains "management by objectiveness" in teamwork. Chapter 3 discusses how use of the matrix organization may offer advantages as an alternative to the traditional organizational pyramid. Included is a 14-item annotated bibliography of books and other published materials dealing with organization maintenance, development, and teamwork. (Author/WL)