This morning I took a few minutes to add microformats to the HTML of my blog. I had done so in the past when my site was using a completely different theme and hadn't taken the time to add them back in. Shame on me. I should have done it much sooner since it took less than 20 minutes and now I think my blog will be a little easier to read for things like webmentions.
This post isn't to be used as a guide in adding microformats to your WordPress theme. I'm simply writing this down as a way to walk myself through my own task of doing so. But if you read it and feel inspired to add microformats to your own site then I've done my job.
In short, the following classes must be added to your index pages (index.php, archive.php, search.php, etc.) and your single post page (single.php) to support the h-entry microformat.