Wondering how to get an actual human being without fighting your way down each branch of a phone tree? Check out Dial-A-Human, which lays out the proper sequence of buttons to push to get a human being as quickly as possible.
The most interesting, and often the most complex sequences: Government offices. My favorites include Department of Homeland Security/INS "Select language. Press 2 6 2 4. Press 0 at each prompt," the U.S. Postal Service " Press 5 4 2 2 at each prompt," and perhaps best of all, the IRS "Don't press or say anything."
Via the indispensable Lifehacker blog.