This document defines collaboration and co-sponsoring events, outlines the benefits and challenges of each, and provides a collaboration checklist. Collaboration is defined as working jointly with others on an intellectual endeavor, while co-sponsoring means jointly sponsoring an event with another organization. Benefits include shared costs, increased reach, and decreased planning time, while challenges involve liability, differing opinions, and increased planning complexity. The collaboration checklist suggests identifying potential partner organizations and their strengths and weaknesses to accomplish shared goals.