First of all, let's assume that you will purchase sheets of business cards
such as those supplied by Avery (stock number 5871, for example). These
cards are formatted 10 per sheet. If you have Publisher, you'll find it much
more satisfactory for this task because you can set up one card and print it
ten times, but Word can also do the job.
If you have Word 2002 or 2003, go to Tools | Reference | Envelopes and
Labels and select the Labels tab (in Word 2007, it's the Labels button on
the Mailings tab). Click the Options button and select your stock number. If
you're using an older version of Word, you won't find Avery 5871, but 5371
is the same layout (just for microperfed rather than die-cut labels). Word
2007 also offers various "Business Card" choices in the list with Microsoft
as the "vendor." Be sure you choose the Horizontal (or Vertical) card that's
2" x 3.5" if you're using the Avery stock I mentioned (this is assuming
you're in the U.S.; if you're elsewhere, adjust accordingly).
Click OK to get back to the Labels dialog and click New Document to get a
sheet of the cards. They're set up as a table, so be sure you have table
gridlines displayed (Table | Show Gridlines in older versions or Table Tools
| Layout | Table | View Gridlines in Word 2007) so you can see the label
boundaries.
You can then create your layout in a single label and copy it to the rest.
For more, see
http://www.gmayor.com/graphics_on_labels.htm
Note that Avery offers "templates" for all the "labels" it sells, but they
are in no way superior to the "label definitions" that come with Word.