Many of us, bloggers, read other blogs, and post on them. And in that blog we give our email adress, name and blog address.
Well, if the blog has dofollow links, then this is a good strategy to run. We write, readers see our name and link to our blog and then they just might visit us, specially one important reader named google bot.
This helps getting our blog indexed, and might help increase search rankings.
Till now this is good, but it can get better. How?
Don’t use your blog address like: yourblog.com, instead point the url to a post of your choice like: yourblog.com/a-post-of-my-choice
This way google will crawl different pages from your blog, instead the same root url, and making google bot think that blog owner is spamming.
You should try this every time you post on a blog. But there is an exception.
The exception is if the blog you are visiting uses commentluv, then don’t bother doing this, because the plugin fetches your latest blog post. 
Hope this was useful.
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I’ve wondered whether this would look more or less natural to Google. On one hand more urls should be more natural but when coming from blog comments perhaps it is more natural that they are all pointing to the homepage.
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you will get more benefits doing this than just linking to your homepage. you can target your posts to the post you are commenting.
This tip is stil used, but most blogs have comment luv that does this automatically for us