" In a digital writing workshop, social bookmarking can become an invaluable tool...Unlike traditional bookmarking, saved on our individual computers, social bookmarking is collaborative. It invites us to share our interests with one another" ~ Troy Hicks

If you're new to social bookmarking, start with a visit to Lee Lefever's Commoncraft video on Social Bookmarking in Plain English and Educause's 7 Things You Should Know about Social Bookmarking.

I recommend starting with Delicious - and then, when you're ready for the concept of "sticking it to the Internet," move on to Diigo.