The Center for Data Insights at MDRC has partnered with organizations to develop and execute a variety of data projects, some with long-standing partners that have participated in MDRC's long-term evaluations; others with newer partners that are just beginning to use data for program improvement. Important lessons about the essential ingredients for implementing successful data projects have emerged from this collaborative work. This brief discusses these ingredients in the context of the Center's TANF Data Innovation (TDI) project. The initiative helps Temporary Assistance for Needy Families (TANF) agencies enhance and build their ability to use their own administrative data to answer policy-relevant questions. As part of this project, the Center partnered closely with eight state TANF agencies to design, launch, and complete data projects to address their analytical questions. The Center also worked with the Administration for Children and Families to design this initiative to address known challenges, and to develop projects that can inform how the federal program can support local TANF agencies. The lessons presented in this brief reflect a three-year collaborative experience, during which all project partners considered not only new data tools and skills, but also new ways of learning together. The Center for Data Insights considers a data project a success when data are used routinely to inform policy and practice with the goal of improving the lives of the families served by programs. The Center has learned from these partnerships that barriers to success are not primarily about technical issues or analytic methods. Rather, data projects need three ingredients to be successful: people, perseverance, and project scoping that includes a clear understanding of a project's needs and goals.