I've written a lot of various content that didn't end up being worth the time I was sinking into it, so I stopped. One example is that while I was studying social media, I pubbed what I learned in blog posts. And they got great traffic at the time...but that kind of thing has to be updated frequently, and I just didn't want to put the effort in for a bunch of people who weren't reading my books.
I wrote articles on writing as well, and those have fared better over time, particularly since they climbed in the Google search ranks. In that area I'd recommend solving a particular problem, not too big--some of my most popular posts are comma blogs and ten ways to use hyphens with numbers. These just have to be correct. A fair few people come, read just the one article, and leave. But some of them pick up my free book, enough to make it worthwhile, especially since these evergreen articles need no updating.
As far as current output goes, I post a short story most months, plus stuff about my new releases and reviews for other writers in my informal blogging group. It's really the short stories that matter the most to me. : )