This site is, at least has been up til now, pretty much all about commenting on blogs. It even has a (sorely in need of some love) search engine for dofollow blogs. But from the comment moderation I do on this site I can say that the general quality of comments is frighteningly low. It’s obvious that most comments come from bots or from people with little time.
Commenting on blog posts can be a nice way to market your site if you just follow some simple guidelines. They’re not hard to do and they will cost you nothing but time. Let’s go through them one at a time.
First, read the blog post you’re commenting on, at least browse it. Trust me, this will prove important in step two. It might seem simple, but trust me, most people posting comments on this blog post will not have read this far.
Second, make your comment connect to the content of the blog post. Ask a question, disagree, agree, expand on the subject, write something to make the author believe you actually read, and care about, what he wrote. This is important, because it makes it that much harder to delete your comment from the moderation queue and so much easier to approve it. Authors wants comments that add value to the page.
Third, do you actually want a link from the site. Getting links from sites relating to your own will help you. A bunch of links from questionable sites will harm you.
You want the really pro tip about commenting on blogs? Read through to the end, at least read the end and make sure you comment on something right near the end. Remember when I said that most people don’t read the full post? One blogger wrote at the end of his post that the first reader to post a specific word in his/her comment would win a prize. The winning comment came in on page four of the comments. Imagine that, you could have won the prize, had I been that guy.