What's the optimal email sequence for cart recovery?

I've been running my Shopify store for two years now, and cart abandonment is killing me. Every month, I see hundreds of potential customers adding products to their cart, only to disappear without purchasing. It's like watching money walk out the door. I know email recovery sequences can help, but I'm not sure about the perfect timing, frequency, or messaging. Should I send an immediate reminder? Wait a few hours? Include a discount? Not include a discount? The uncertainty is driving me crazy. My current email strategy feels like throwing darts blindfolded—sometimes I hit, mostly I miss. I've tried generic 'Come back!' emails, but they feel impersonal. I want a strategic approach that feels genuine, creates urgency, and actually recovers those lost sales without making my brand look desperate. The stakes are high: every recovered cart means more revenue, better ad spend efficiency, and a healthier bottom line. I need a systematic, data-driven approach to turning those abandoned carts into completed purchases.