Sounds impossible? Well I guess not. Most people thought they may not be able to get any link juice from No Follow blogs which generally they are right because most blog owners (especially those high PRs) would not like to give out too many outbound links.
But now, there is way you can do it. Look for blogs that have “Top Commentators” widget installed. Comment heavily (yet properly) so that you can get in as one of the Top Commentators. If you check your link in Top Commentators, you will realize that links within are all non-no follow. Which means you are getting quality back link from them. However, depending on how frequent the blog owner reset the Top Commentators count, your link may not exist for long.
Note: Please comment properly by not posting comments like “Yes, I agree”, “Wow, great post”, “I totally agree with you”. Post quality comments, not quantity comments.
leaving meangful and informative comments can be really useful it will not only get you link from the blog you are commenting one but it might earn you some loyal readers who may also subscribe to your blog and do a mouth advertising of your blog.
but leaving a spamm comments just to get a link from another blog wont work for you and chances are you might have bad name in blogging community for your spamming comments.