This article summarizes behavior management strategies for preschool children who are at high risk for attention-deficit/hyperactivity disorder that have found to be effective in improving child behavior. Both parent and teacher training programs are reviewed, as these have been backed by substantial research evidence. In addition, multimodal treatments that include some combination of parent training, teacher training, and social skills training are also reviewed. Interventions emphasize the need for a strong adult–child relationship combined with proactive behavior management strategies to improve child behavior.