To enjoy the full benefits of Diigo (seamless bookmarking, tagging, highlighting, clipping, sharing, annotating, searching, plus more!), we highly recommend that you install the Diigo toolbar (ie. a browser add-on extension). It installs in seconds, and no adware / spamware! Best of all, it's fully customizable to save desktop space!
http://www.actdu.org.au/archives/actein_site/basicskills.html