Fix or Fail Fast — Common Mistakes & Rapid A/B Tests

About half the people who open your emails decide in under a second to stay or swipe away. Now, here’s the twist: most marketers respond by rewriting the entire email. In this episode, we’ll zoom into tiny changes that quietly double results while everything else stays the same.

36:1. That’s the average ROI email delivers—and yet most senders leave a big chunk of that return on the table. Not because their ideas are bad, but because preventable mistakes quietly choke performance: sloppy lists, vague subject lines, one-size-fits-all blasts, emails that break on mobile, and tests that “optimize” the wrong thing.

Today, we’re shifting from “write better emails” to “build a better decision engine.” Instead of guessing what might work, you’ll learn how to run small, fast experiments that tell you exactly what to fix first. Think of this as moving from vibe-based sending to evidence-based sending.