In the comment area on most blogs there is no area to leave a signature. Do you just avoid those blogs or is there a way to leave a signature?
Usually you can enter your URL so that people can follow your comments back to your site. Your name should be clickable back to your site after you make a post.
Also, if you get greedy and leave a signature within the comment you will likely have your comment declined. Also, if you are going through the work of leaving comments make a worthwhile comment. If you offer some valuable input people will be cusrious who you are and visit your link.
Some blogs even allow you to link to a particular webpage or blog posts. The best is to find those dofollow blogs with commentluv. Your latest blog post will be displayed as well.
My strategy for blog posts is to first see if I can post my URL. If not I move on to something else. I select blogs that are interesting and that I am qualified to comment on and I do write relevent comments. Finally I commend the blog author for posting an interesting topic or useful information. Authors like to post positive comments. You are more likely to get your comment posted if you are complimentary.
This is good advice. If you try to do things too quickly, take shortcuts, spam etc. it won't pay off. Offer something of use to the blog post or don't bother at all.