I regularly share my picks for the most useful posts of each month. I also publish a list of the month’s most popular posts, based on the number of times they are “clicked-on” (though I’m a bit behind on that one).
I also share a list of Post Rank’s analysis of each month’s top posts. Post Rank uses a variety of ways to measure level of “engagement” that readers have with specific blog posts. I have a constantly updated “widget” on my blog’s sidebar that lists these posts, but I thought a monthly post would be helpful/interesting to subscribers who don’t regularly visit the blog itself.
Here are their rankings for the month of August: