This report describes lessons learned over the initial 3 years of the implementation of the Office of Juvenile Justice and Delinquency Prevention's SafeFutures Program To Reduce Juvenile Delinquency and Youth Violence, a 5-year demonstration initiative designed to prevent and control juvenile delinquency through a continuum of care in communities. The report is based on information obtained through multiple visits by evaluators to each of the SafeFutures communities during the first 3 years; follow up discussions with selected participants; and analyses of secondary documents. The report presents details on each of the programs, which focused on after school support; mentoring; family support; mental health services; delinquency prevention; gang-free schools and communities; day-treatment programs; continuum-of-care services for at-risk and delinquent girls; and serious, violent, and chronic juvenile offender programs. Lessons learned are grouped according to three categories reflecting three primary audiences: those responsible for creating or managing funded demonstration projects; those involved in community-based collaboratives; and those responsible for providing services to youth at high risk of delinquency, violence, and victimization of their families. (Contains 115 references.) (SM)