This guide looks at how the choices made in organizing events contribute to building and nurturing a sense of community amongst attendees, as well as increased community member engagement and connectedness. This manual is authored by a team of scientific community managers who were part of the 2019 Center for Scientific Collaboration and Community Engagement (CSCCE) Community Engagement Fellows Program (CEFP). CEFP 2019 was funded by the Alfred P. Sloan Foundation. This manual is intended to contribute to the stated goal of the CEFP to “collect and disseminate knowledge about building strong collaborations and communities.”