This manual is designed to teach young people about planning a conference and to offer advice to the adults working with them on providing support. It is based on a successful sex education conference sponsored by the Youth Action Program (East Harlem, New York), which was planned and conducted by young people with minimal adult leadership. Part 1 of this manual offers guidelines on: (1) clarifying the need, purpose, and goals; (2) charting the planning process and forming a planning group; (3) developing leadership; (4) helping youth to speak out clearly; (5) establishing an effective planning group; (6) running meetings; (7) making decisions; (8) conflict resolution; (9) deciding on content (topics, issues, and questions); and (10) developing a format. In part 2, seven case studies are presented of youth participation in health projects. A brief report is given of each project's objectives, activities, problems, implementation, and outcomes. (JD)