In addition to adding web pages to your Google Shared Stuff page, or emailing those web pages, you can also add them to related social bookmarking sites such as Facebook, Furl, del.icio.us, Social Poster, Reddit and Digg.
You can also view everyone’s shared stuff by most popular, by searches on tags like youtube, or via a domain search such as google.com. Obviously, you can view a specific user’s shared stuff, such as my Google Shared Stuff. There are RSS feed options on each of the above pages, this way you can stay up to date on shared stuff that interest you.
Tony Ruscoe documents step by step, with screen captures, how it all works.