You may notice (on the right hand side of this site, if you use the default view; or see image below), a list headed “My comments elsewhere”, with links to other people’s blog posts, on which I’ve recently commented.
I’ve been asked how I do this.
Every time I comment on a blog post — and I try to do so often, both to show my interest in others’ work, and to be part of their conversations — I bookmark that post on the social bookmarking site
Delicious Pinboard, and tag it “comment”.
I then pass the RSS feed of all my bookmarks with that tag: http://feeds.pinboard.in/rss/u:pigsonthewing/t:comment/ to WordPress (the software I use to author and host this blog), which magically displays a list of the most recent five, as you can see.
The full feed is, of course, also available to anyone who wishes to subscribe to it in the feed reader of their choice; and my tagged comments can also be read as a web page.
In this way, as well as telling my readers what I’ve done, I bring extra attention to the blogs I comment on, thereby helping, albeit in a small way, their authors.
Why not bookmark your comments, and put a feed of them on your own blog?
Update: Delicious became awful when it relaunched, I now use Pinboard.
Update: You can also use this technique to add the list of your comments (specifically, the relevant URL on the bookmarking site) as a “work”, in your profile page on services which list your publications, such as ORCID.