Social Bookmarking is a popular and effective way of building back links and promoting traffic to your website. Social bookmarking websites are becoming more and more popular. They allow you to save bookmarks online and Tag/Categorize them with keywords instead of saving them as bookmarks in the favorite’s list of your browser.
I have compiled a list of Social Bookmarking websites here from a number of sources for your use.
Visit some of the sites provided here. Create an account. Then bookmark interesting and useful things in the areas of your interest or expertise. By doing so you create a useful Feed. Once you’ve done that you intermittently, (or aggressively), add useful and interesting items, (perhaps also from your own content), that could use additional exposure.
Here are the list of social bookmarking sites I've collected ever I started in Link Building.
I'll be updating this next time. So keep tuning!