Each of the five sessions contains presentations by experts in the fields of alcohol, tobacco, and other drug- use prevention; activities to increase a trainee's effectiveness in the prevention of tobacco, alcohol, and other drug use among youth; and an opportunity for trainees to build their own "tool boxes" of prevention resources. Session one examines tobacco, alcohol, and other drug use by youth and presents the risk and protective factors that research shows hold promise in prevention efforts. The second session introduces the Social Development Strategy for implementing two key protective factors against drug use: healthy beliefs and clear standards, along with bonding, including the role that culture has in promoting bonding. Session three presents a number of ways to use healthy beliefs and clear standards in providing youth with consistent messages about drug use. The fourth session helps trainees to determine when youths are experiencing problems and explains how they can support and assist youths in getting the appropriate help. The final session explores the effort to maintain bonds between youths and the adults who work with them; it then examines youth service as one way to provide youth opportunities for meaningful involvement in constructive activities. A "tool box" of additional resources completes the manual.