This is my first post with an advice for the Macsen, and Emacsen alike!
So let's say you're working on your LaTeX article. Let's assume you're into the "\C-c \C-c" way of life. Isn't that a bore to compile the pdf and then also have to (close any opened window and) open the file, every time you make the smallest of the changes? Fear not. Skim to the rescue! Go to the preferences pane, in the Skim tab, you'll find an unchecked box saying "Check for file changes". Now why is this unchecked in the first place? No one knows for sure... Just pick from the preset Aquamacs Emacs (or tweak arround to match your preferences), and you're ready to go. Open the file once. Now switch to emacs, change the TeX source, and compile it. Skim will ask you if you want to reload the file, just tell it to keep doing it automatically from now on - and that's it! One less "\C-c \C-c" for article compilation, multiplied by... lots!, that means... well.. a healthier life for your fingers, at least! Here's the screenshot, for your delight.