Which is more effective backlinking ?

Do-follow Blog Commenting or
Social Bookmarking ?

 

Social bookmarking using trusted and well used accounts The thing with do follow blog commenting is very soon spammers will invade the blog and your site will be linked along with all spammers.

 

Blog commenting is the best way or use the formula of linking by A-b-c-A

 

I say it is blog commenting for as long as you provide a really meaningful and relevant comment and that you post the same to high PR sites.. Social bookmarking is also a great way to get backlinks but based on the results I get, more backlinks came from the sites where I commented than those I received from social bookmarking sites..

 

do follow is the best way to go like gene said theme sights and higher the pr the better

 

I think that do follow blog commenting is better.