Oh my gosh. I'm not sure how many people out there have had the same dilemma as me, but I'm here to help that with my new-found discovery. I know others probably know about this, but I just wanted to post for any of you who are wondering where this shortcut is in OSX. In Windows, You can Ctrl-Arrowkey left and right from word to word. It's a very handy way to get down a line of text without having to resort to your trackpad. And I, for months, have always wondered how to do this on my mac. I know that Cmd-Arrow will go to the very beginning for very end, but never from word/space/separator! It's Alt/Option-Arrow! It works! Yay!