My favorites are the emacs-style shortcuts that work in all native textfields is OSX:<p>ctrl+f - move one character forward<p>ctrl+v - move one character backwards<p>ctrl+n - next line<p>ctrl+p - previous line<p>ctrl+k - delete to the end of the line<p>ctrl+d - delete the next character<p>ctrl+h - delete the previous character (backspace)<p>ctrl+o - insert a newline below the current<p>Using the ctrl key takes some getting used to if you've used a Mac for a long time (I mapped mine to caps lock in the system preferences) but once you learn these keys they are incredibly useful.
I like CMD + CTRL + D while hover your cursor over any word in a Cocoa app. This brings up the dictionary entry for that word. You can also access the Thesaurus this way and click "More..." to get the full Dictionary app to load.<p>Very useful when reading long academic papers outside of my field.
Thanks everyone! I wrote the original article. Not only have I learned a bunch of new ones (the floating dictionary is sweet) but I've discovered ycombinator too! Thank goodness for pingback, eh?