AI-generated subject lines often follow standard patterns. Human marketers can achieve better results by A/B testing creative, non-standard ideas like using odd numbers or partial sentences, which AI models typically don't suggest.
To stand out from polished, AI-generated emails, use unconventional formatting. Tactics like extremely long subject lines, starting with an ellipsis, or using all lowercase letters grab attention by looking distinctly human and breaking patterns.
Numbering newsletter editions (e.g., 'Edition #117') in the subject line creates a 'collector' mindset, encouraging readers to find missed issues. Archiving these numbered editions on your website also builds a valuable SEO asset and drives traffic.
Instead of creating new lead magnets from scratch, bundle your best existing content—top podcasts, articles, or guides—into a single 'vault' offer. This is an efficient way to create a compelling offer that leverages assets you already know resonate.