There are many social bookmarking sites we can search in google. One of the best and high page rank site is
http://www.sparkinfosys.com/free-article-list.html jus view this site u can post many useful off-page backlinks
and in social bookmarking,directory submission if we post high page rank i.e more than 4 is best to rank our
website in high level. what you are guys saying?