If it´s cliparts you´re talking about Tracy, Paula is right, those are my favorites places, but you can also find some great cliparts in
http://travelingnuts.com/clipart/ , it´s Joe Phila´s site(who´s a MS member) and
http://vector-cartoons.com/, in this last one you have to subscribe and they let you dl 5 a day. And other way to find is just making a google or bing search.