I just came across a Lawyerist post from last year that gives very detailed, step-by-step instructions on how to format a brief in Microsoft Word.
I have been using Microsoft Word for nearly 20 years with frustrating results, so I finally decided to learn the intricacies in order to become more efficient. It was just a coincidence that I saw this post a week or so ago. It deals with section breaks, fields, citations, headings, tables of contents, etc.
I'm simply linking to the original post HERE so that I can find it again the next time that I need it. If anyone has a brief coming due, you might want to check it out.