I use social bookmark and networking sites to promote my clients, this can boost traffic by 30% in 7 days.

If you create a simple video like this  http://www.youtube.com/watch?v=VXWWoi2pwAE
and social bookmark the video, then keep a eye on your increasing direct traffic stats. (make sure you put the url on the video title)

Here are my Top 10 List of Social Bookmark sites that I know boosts traffic

www.digg.com
www.del.icio.us
www.StumbleUpon.com
www.reddit.com
www.MyBlogLog.com
www.blinklist.com
www.newsvine.com
www.mister-wong.com
www.furl.net
www.technorati.com
 
Social networking sites like facebook and myspace are very important and having your corporate profile can boost rankings and brand awareness
 
Here is an example of a corporate profile I setup for nochex
http://www.facebook.com/profile.php?id=1060231962

Thanks

Matt