I think, basically using the email to point to blog posts and other content you create/manage (or sponsored posts). I agree nor just a link, but you'd need some kind of teaser, a few sentences or a paragraph lead in with a "continue reading" link to the full article/post, etc. Each link would track clicks and such so you could build up data on what is popular, and who likes it.

The key being, once you have eyeballs out if the email and on a page, you're more open for affiliate links and advertising options based on the data you're gathering.