This chapter reviews recent research regarding behavior interventions for young children. We first consider the implications of allowing maladaptive behavior to remain untreated in young children. The reasons that people may select for inaction are illustrated through a case example of an individual who manifested behavior problems that were allowed to continue through accommodations rather than being addressed through interventions. We then consider several examples of promising behavior interventions for very young children that can be carried out in home and preschool environments. Next, we review promising interventions that are appropriate for school-based settings. We conclude with the observation that while it is absolutely necessary to deal with urgent situations evoked by maladaptive behavior, it is critical to keep sight of the goal that we should always work to promote more mature, self-regulated, and acceptable behaviors across settings. [For the complete volume, "Special Education for Young Learners with Disabilities. Advances in Special Education. Volume 34," see ED596193.]