The goal of the Early Childhood Mental Health (ECMH) Best Practices Project in Multnomah County, Oregon, is to improve the ability of early childhood professionals and partners to support and strengthen the emotional and relational development of young children with their families and communities. This report presents the activities for Year 2 of the project. The focus of Year 2 was to identify current best/promising practices for child and family-serving agencies, organizations, programs, and disciplines. The components of the project included: (1) a project steering committee; (2) two workgroups, comprised of community members to complete a review of current literature and develop a learning model for ECMH professional development; and (3) a community learning event which provided an interdisciplinary audience with a common foundation of knowledge about early childhood mental health. Using an interdisciplinary approach, the project represented the views of child welfare, mental health, health, community justice, early childhood care and education, developmental disabilities, and medicine. The report details key messages learned from Year 2, delineates Year 2 accomplishments, describes the findings related to best practices, and presents plans for dissemination in Year 3. The report concludes by noting that the findings of the project help chart an evidence-based path to strengthen community efforts to develop infrastructure for child and family serving programs. The workgroups' findings and the community learning event highlighted the primacy of relationships as the key structure, process, content, and focus for effectively promoting developmental health for children and families. (KB)