This document discusses social citation tools, which allow users to organize references and resources online, share them with others, and see what materials other researchers are reading. Some key social citation tools mentioned include CiteULike, Mendeley, Zotero, and LibraryThing. These tools make it easier to collaborate, find relevant resources, and discover other researchers working in similar areas. The document advises choosing a tool that others in your discipline are using and that works best for your needs and preferences.