Using Full Keyboard Access on Mac OS X

So, for the longest time I have been wondering how to tab through options in OS X applications using the keyboard. For example, the keyboard shortcut for logging out is SHFT-CMD-Q, but if you hit this on accident, you have to find the mouse and click "cancel" instead of hitting TAB to get to "Cancel" and then RETURN.

Here's how: In Mac OS X's System Preferences panel, select the Keyboard and Mouse pane. Select the "Keyboard shortcuts" panel (the last one). Click the "Turn on full keyboard access" option at bottom.

Now, to cycle through options in Aqua applications, just hit TAB. A perplexing feature was that you can't just hit RETURN when you've got something selected after hitting TAB; you have to hit SPACEBAR to "click" a highlighted choice once selected. Hitting RETURN will just select the blue-shaded default option.