This document discusses starting a Community of Practice (CoP) for the Community Ecology Institute (CEI). It provides background on what CoPs are, including that they are groups who share a passion for a domain and learn from each other. It then outlines key aspects of starting a CoP, such as deciding the domain, creating space for community, managing knowledge, and governance. Next steps proposed are to decide if a CoP fits CEI's goals, identify potential practice areas, approach partners, and set up governance and tools. A sample list of potential CoP partners is also included. The document closes with additional resources on social change, imagination, innovation and collaboration.