Tips and tools for common web searching tasks. Companion web site available at <a href="http://www-personal.umich.edu/~pfa/pro/8fold/">http://www-personal.umich.edu/~pfa/pro/8fold/</a> Pay special attention to <a href="http://www-personal.umich.edu/~pfa/pro/8fold/refine4.html">http://www-personal.umich.edu/~pfa/pro/8fold/refine4.html</a>