If you've recently switched to Office 2007 (as I have), I strongly urge you to immediately go download and install Microsoft's "Search Commands" toolbar (or "ribbon" in the new vernacular).
The hardest part about making the switch to Office 2007 is trying to find the commands you're used to using regularly. While I think the new Office ribbon is very cool, it also takes some time to warm up to it. The Search Commands ribbon speeds the process by providing a way to quickly search for a command and then use it (see below).
Read more about the Search Commands Toolbar in Microsystems' Word Tips and Tricks.