The business card templates are hidden away under "Letters & Mailings." For some reason, Microsoft lumps them in with "labels." It has preformatted templates for all manner of labels, from shipping to file folder to CD, in the midst of which you'll find business cards.
Here's how to make your cards:
Tools
Letters & Mailings
Envelopes and Mailings
Click on the "Labels" tab
Click "Options"
At this point, you get to choose the manufacturer (Avery, MACO, etc.) and product you want to use (label, business card, etc.) If you bought a package of business cards, choose the kind you bought. Even if you bought an off-brand, it should tell you what Avery number it's compatible with. If not, just try a few choices until you find one that fits or that you like.
Just type in the rectangle provided, choose "full page," and print. Or, you can type in the rectangle provided, choose "full page," then make it into a new document, from which you can edit them.
I usually just make a new document first, then do one card the way I want it. Once it's all fancied up, I copy it into each space on the page. If you need some cards for different purposes, but not a whole page of each, you can put both on one page.
You're welcome!
it does have it's moments 
