Good advice--I regularly clear my history (daily, sometimes twice a day), because not only do I want anonymity from AH, but also, my kids come in and ask to use the computer, and if they do a search for something starting with "S" this website will pop right up.
It's kind of a pain, but I just bookmark the other sites that I do want and clear all the rest.
I don't log out every time, but maybe I should.
Pixilation: Thanks for the advice--I have Firefox so I'll check into that setting.