I don't know if anyone has mentioned this, but OS X comes with the simulated therapy program, Eliza. In the terminal type emacs and hit enter. When the editor has loaded, hold shift and hit the escape key. Then type xdoctor and hit return. Answer the first question and proceed from there. When you're done, control-X control-C will quit the editor.
This is saving me a bundle already! :-)
Mac OS X Hints
http://hints.macworld.com/article.php?story=20020902090046346