This document summarizes key learnings from data-driven experiments and program trends during open enrollment periods 1 and 2. It discusses how literature testing found that personalized language and affordability messaging were most effective. Phone outreach to Latinos worked best with multiple contacts and inclusion of insurance information. Follow up programs saw higher enrollment when using both phone and email. Email personalization increased clicks the most for less engaged consumers. Connector appointments on weekends and closer to consumers' homes had higher completion rates.