[ Aleksandar Marković @ 23.08.2006. 21:37 ] @
* Don't put personally-identifying information in your searches...
* Don't use a search engine operated by your ISP...
* Don't log in to a search engine account...
* Don't accept cookies from your search engine...
* Use a separate browser or browser profile for search and for other activities....
* Use an anonymizing proxy, or proxy network like Tor...

http://www.eff.org/deeplinks/archives/004868.php