In short, search Google Maps for a business, click the call button, enter your telephone #. Google calls your phone and the business and connects you for free (including long distance charges, but not cell phone airtime, of course).
There’s a lot you can do with Google if you can take advantage of it’s advanced search features. Expanding on this tip which shows you how to find music in open directories, here’s a step-by-step walkthrough on how to use Firefox Smart Keyword searches to speed up the process.