http://www.youtube.com/watch?v=x66lV7GOcNU
del.icio.us is one of the popular social bookmarking websites. I've created one for LWIT, but you'll likely want one of your own as you learn more about them. Other sites include: furl, blue dot, ma.gnolia, and more - Read WIRED's Social Bookmarking Showdown or Robin Good's Social Bookmarking Services and Tools for reviews on the many of them.
Why Social Bookmarking?
Resources for creating and using del.icio.us accounts:
Ideas for using social bookmarking tools effectively in education: