Random tip for Microsoft Office Word 2007 users that I just learned: MS Word defaults to saving documents in the new .docx format, which is incompatible with all the existing versions of Word that are out there. So, to send a file to someone who has the older version, you have to go through an annoying "Save as..." loop every time (which you'll invariably forget when it's most important).
However, my friend Korbett just alerted me to the fact that there is a four-levels-deep setting that can make Word 2007 default to save in the friendlier .doc format instead of .docx. Here's the sequence:
"Office" button =>
"Word Options" button (it's hidden down at the bottom) =>
"Save" link =>
"Save Files in this Format" = Word 97-2003
There ya go.