Recommendations presented in this bulletin on effective practices for supervising underage drinkers in the community include the following: 1) an effective community supervision program should emphasize four goals: community protection, youth accountability, competency development, and individual assessment; 2) conditions of community supervision must be clearly stated to the youth, must be constitutional and fair, and must help rehabilitate the youth; 3) community corrections and diversion professionals must acknowledge the diverse cultural backgrounds of youth and tailor interventions and services accordingly; and 4) justice system professionals must remember that youth under supervision maintain certain basic constitutional rights and that violation of these rights, intentional misconduct, or negligence can result in legal liability. This bulletin is part of the underage drinking bulletin series that was created by the Office of Juvenile Justice and Delinquency Prevention (OJJDP). The focus of the series is to provide information for educators and policymakers who deal with underage drinkers and the problems they encounter as a result of alcohol abuse. Six principles for addressing underage drinking are discussed in detail in this bulletin. These principles include 1) implementing a comprehensive approach, 2) providing a balanced response, 3) use evidence-based practices, 4) develop culturally appropriate responses, 5) increase practitioners' knowledge and understanding, and 6) collaborate with agencies and other organizations. Notes and references