Prevention research on the related problems of child abuse, youth violence, and domestic violence has grown at an accelerating pace in recent years. In this context, a set of shared methodological issues has emerged as investigators seek to advance the interpersonal violence prevention knowledge base. This article considers some of the persistent methodological issues in these areas and points out emerging research strategies that are forging advances in garnering valid, rigorous, and useful knowledge to prevent interpersonal violence. Research issues and emerging strategies in three key domains of prevention research are considered, including complexities in validly conceptualizing and measuring varying forms of violence as specific targets for preventive intervention, research issues and strategies designed to reliably predict and identify future violence risk to be targeted by preventive intervention, and research issues and emerging strategies in the application of empirical methods to forge specific advances in preventive intervention strategies themselves.