Look for footprints for blogs that allows you to leave comments with dofollow backlinks. It's not important how many links you have created. It is more important that you have 1 quality backlinks than to have thousands of spammed backlinks. Both blog commenting and bookmarking are essential in SEO, as long as your keywords are diversified and you use more generic keywords like "visit this site" to index your backlinks, as well as your money site. So keep on doing what is more important and what google loves.

Obviously,do-follow social bookmarking site is best than blog commenting ...

i also want to get one

it is best to use a mix of different platforms, that will give you the best results!!!!

I suggest Blog Comment, it's very useful in SEO

Blog commenting is best way to get traffic for website as well you can get traffic for website. Blog commenting is best way and standard way to back link for long time.

The questions is "blog commenting" or "social bookmarking", to answer that I will arise another question i.e. why not the both if we have the opportunities...???

Both are too much beneficial for getting backlink......

Exactly what I was saying......We all know the importance of backlinks, then why not use the both?

Ya!! you says right but I'm still confused about google algorithm because Google says don't get backlinks from directories, blogs, articles..If we'll not get links from these websites then how can i get ranking on google?? Can you guys explain me??

Both are important and are only one of the ways to get backlinks and improve your PR and get traffic. Besides there are many ways like directory submission to get backlinks and improve traffic to your site.

"Google says don't get backlinks from directories, blogs, articles"- Where did Google say so?? Can you provide any related authentic links to it...???

blog Commenting Or Social Bookmarking both are good for your website. I think dofollow social bookmarking is best to get traffic.

My personal experience proves that paidforumposting.com provides the best and most professional blog commenting service.

Both are the best source for building high quality backlinks. But I prefer social bookmarking more.