Two things I just started doing in Word 2007 that make it better.
1. Views - I should have been using these for a long time
The outline view is totally amazing. I am coding an ILIT Template for a client in HotDocs and just by using this view, I fixed some of the outlining issues that I was having. The draft view is great for viewing a large document as it significantly speeds up the reviewing process.
2. Quick Styles Gallery
Very nice to be able to add certain styles I use over and over again to the Quick Styles Gallery for easy access