Here it is, by popular, frustrated demand: the master list of every secret (or not-so-secret) keystroke
in OS X Mountain Lion, including all the keys you can press during
startup. Clip and post to your monitor (unless, of course, you got this
book from the library).
Note
For the most part, the following list doesn’t include the
keystrokes already listed in your menus, like ⌘-P for Print, ⌘-S for
Save, and so on.