The Social Bookmarking Sites are great for generating targeted traffic to you Hubs, Lenses and websites. These sites allow you to create accounts and bookmark sites for your use and to share with members of the social bookmarking community.

This is a no price way to drive traffic to your site(s). If used effectively and not by spamming. Sites like Hub pages and Squidoo are spammed alot and the owners are taking suitable steps to cut down on the level of spam content.

Also for the same reason I do not spam social bookmarking sites. Several of them have suffered due to spam as well. Please do not take the list I am about to share here to spam with.