Here are thirty useful Internet search tips, as pointed out by Brad DeLong, channeling Elizabeth Lane Lawley, who is in turn channeling Mary Ellen Bates.
My favorite idea is number 17:
Use Teoma.com to identify experts’ sites, link-rich pages. (Look at “resources” section on results page; these are “link-rich” sites on your topic.)
And let’s not forget the last suggestion:
Some searches are simply not meant to be done online.