“You’ve probably got plenty of evergreen content sitting around that would be good as new to your email subscribers. Of course, you also have different audiences on different channels, so your newsletter subscribers might like a peek at what you share on your blog or social media.”
Reuse existing content in emails to welcome new subscribers. For example, try sending a whitepaper or how-to guide to thank them for opting-in. They’ll appreciate that you took the time to thank them; as an added bonus the repurposed content will be brand-new to the subscribers!