As I was digging through my web archives, I found a link to an article I found years ago that explains how to create a tri-fold brochure using Microsoft Word. However, the article is no longer found on ZDNet's website. Luckily, my web archive still had the text for it, and is now available here:
Creating A Tri-Fold Brochure In Word
There are other desktop publishing applications (like Microsoft Publisher or Adobe Pagemaker) that makes these type of publications easier to make. But if you don't have any of them, create a tri-fold brochure is now well within your reach. Furthermore, the principles taught in this article can also help you to create other types of publications and business forms in Microsoft Word. In fact, it could end up being easier using Microsoft Word than learning how to use another desktop publishing application.
Microsoft Word can certainly do a lot more than most people think.