I have a question about how to do something in Microsoft Word. I'm not sure which Stack Exchange site to use. Any tips?
I have a question about how to do something in Microsoft Word
That's most surely Super User terrain. Most SE sites are about OS's, but Microsoft Word is only supported on Windows and OS X, but the thick of users are on Windows. Just make sure to do your homework before asking (what you tried, what didn't work, how you did, etc.).