This is advice for your blog but it might work for other pages too.
If the reader has reached the end of the page, they probably thought whatever you wrote was alright.
They might even want more of it, you never know :-)
Anyway, adding a "want to get more like this in your email inbox as soon as it's published?" signup form at the end of the page could get you a big increase in signups, just because it's in the right place, psychologically.
It's a quick way to build your mailing list.