The document summarizes an Enroll America roundtable discussion about lessons learned from the third open enrollment period and best practices to use for the fourth open enrollment period. The goals of the discussion were to share positive experiences and tactics from OE3, identify best outreach practices to use in OE4, and identify events to duplicate in OE4. Participants broke into groups to discuss outreach best practices, successful outreach events, and takeaways. The full group then debriefed on lessons learned, effective strategies, and ideas they planned to implement in their communities for OE4.