http://bit.ly/qP9DKg Social Bookmarking sites are seo-friendly, and within just 1 week of submissions your one-way links begin to appear in all main serps. If you are serious relating to your site's link building, position and site visitors, then social bookmarking is critical for you


More here:
Best Submissions to Bookmarking Web sites
good-latent lsi make-your page particular particular-software prominent-and rankings-really search-phrases