I've written an article for the June/July 2007 issue of InDesign Magazine about how to use the Tools > Create InDesign Contact Sheet command in Adobe Bridge to create contact sheets.
First of all, if you are serious about becoming a "Jedi Master" of InDesign, you should subscribe to InDesign Magazine. (Enter the discount code "BACKPAGE" to subscribe for $39 (1-year) or $69 (2-years). Each issue packs in an unbelievable amount of InDesign-specific information.
The Create InDesign Contact Sheet command is a great way to automate contact sheet, photo album, catalog and coffee-table book production with either InDesign CS2 or CS3. Since the Create InDesign Contact Sheet "command" is really a Bridge script, its features are largely undocumented. That is where my article is useful.
You can also read more about this at InDesign Secrets.