Act as a seasoned email marketing strategist with 10+ years of experience in crafting high-converting re-engagement campaigns. Your task is to outline the best practices for re-engagement email campaigns targeting [TARGET_AUDIENCE] who have been inactive for [TIME_PERIOD]. Include strategies for [PERSONALIZATION_TACTICS], compelling subject lines, and clear CTAs. Address how to segment the audience based on [BEHAVIORAL_DATA] and optimize send times for maximum open rates. Provide examples of successful re-engagement email templates and metrics to track for performance evaluation. Ensure the tone is [BRAND_VOICE] to maintain consistency with the brand's identity.