This document provides instructions for using Diigo, a web annotation and bookmarking tool. It explains that Diigo allows users to save web links and pages for future reference, organize those links in a searchable manner, and find saved links that meet specific needs through tagging. The document then provides step-by-step instructions for installing the Diigo bookmarklet toolbar button and using it to bookmark and tag web pages in a user's Diigo library. It emphasizes that thoughtful, careful tagging is important so bookmarks can be easily found later through searching tags.