Unlike Dave I’ve owned a Mac for nearly three years now and thought that I was fairly adept with OS X and knew most of its secrets. This evening though I found out that you never really stop learning.
There’s a shortcut in Safari and the Finder that allows you to navigate quickly up a directory or website hierarchy. Command+click on the folder name at the top of the Finder window or in the web page’s name at the top of a Safari window and you’re shown the path of the file / web page you’re at and can quickly navigate back upwards. If you’ve got a three button mouse plugged in then a middle click will have the same effect.
It makes me wonder what else I’ve still not found out about OS X.