Link building and SEO
 

Link building a challenge for every webmaster or site owner. You can do following steps to build free backlinks.

(1)Social Bookmarking
-Make sure sites are no-follow
(2)Forum Signatures
-Easy and best way to build quality back links. You will get huge traffic also. Make sure to use do-follow link forums.
(3)Blog Commenting.
-Make sure do-follow
(4)Article submission
(5)Directory Listing
(6)Social networking sites
(7) Link exchange
-Beware of link farms.

Thanks for the sumup. I want to ask that why Links from Social Bookmarking must be nofollow? Its because Google doesn't gives any importance to nofollow links while ranking.