Volence is a public health issue, which requires a public health approach to prevent. An important step in this model is the promotion of evidence-based prevention and intervention stratigies. The field is ever-changing but here are a number of important resources.
Blueprints for Healthy Youth Development, Center for the Study and Prevention of Violence, University of Colorado Boulder
Preventing Youth Violence: Opportunities for Action, Injury Prevention & Control, Centers for Disease Control and Prevention
National Registry of Evidence-based Programs and Practices (NREPP), Substance Abuse and Mental Health Services Administration (SAMSHA)
Model Programs Guide, Office of Juvenile Justice and Deliquence Prevention
Programs & Practices, CrimeSolutions.gov, National Institute of Justice