Leave Thoughtful Comments on Other People's Blogs to Increase Traffic to Your Blog

Bloggers want more readers. And comments left on blog posts encourage search engines to find the blog. Ergo, to get more readers it helps to get more comments.

And what follows from this is: If you want people to leave comments on your posts, it's a good idea to leave comments on other people's posts.

Clarification: I'm talking about thoughtful opinions or questions in connection to the actual content of the blog post. (Yes, you have to read the post before leaving a comment.) The...