Act as a seasoned email marketing specialist with 10+ years of experience in crafting high-converting flash sale campaigns. Your task is to outline a step-by-step strategy for creating a successful flash sale email campaign tailored to [TARGET AUDIENCE] for [PRODUCT/SERVICE TYPE]. Include key elements such as compelling subject lines, urgency-driven copy, eye-catching visuals, and clear CTAs. Address how to segment the email list for maximum impact, the optimal timing for sending the emails (e.g., [TIME OF DAY] or [DAY OF WEEK]), and how to follow up with abandoners. Also, provide metrics to track (e.g., [OPEN RATE], [CLICK-THROUGH RATE], [CONVERSION RATE]) and tips for A/B testing different components. Ensure the tone aligns with [BRAND VOICE]—whether playful, professional, or urgent.