Which free blog sites are the best to link my website to for SEO ranking?

-I heard its great to have a blog linked to your website for google SEO ranking. Which free blogging sites are the best and respectable?I think Classified post is the most important in the SEO OFF PAGE Optimization.I have already used and get more benefit(traffic & ranking) from following classified website :-



Adsglobe.com

Quikr

ads2india.com

Clickindia

OLX

Kugli

Expatriates

Meramaal

Adbhai

ilist
Sites are ranked hire because of their content, you must make sure the site that link to your site has a great content. Following are few website that you can use, they are well famous.
I would recommend Squidoo.com, blogger.com and wordpress.com . But be sure to provide quality and relevant content on these free blog sites to get strong backlinks.