Collaboration is appealing in concept but challenging in practice. While extensive resources—including ones from the Community Tool Box, The Intersector Project, and NewNetworkLeader.org—exist online to support collaborative efforts, the fact remains that we human beings are simply not very good at making “we” work. And yet, most changemakers today acknowledge that to address the complex social and environmental challenges we face we must learn how to collaborate—across organizations, sectors, networks, and differences. Effective collaboration must become a reality, not just an aspiration.