One of the most important resources for me for working with Word is the following book:

Word Hacks - Tips & Tools for Taming Your Text by Andrew Savikas
http://oreilly.com/catalog/9780596004934/

Here's a review of the book by WordMVP Bill Coan and links to further resources:
http://word.mvps.org/Tutorials/Books/WordHacks.htm

hth
Frank