Take Charge of Your Business Listing on Google and Elsewhere
I don't know why this isn't better known, but Google has a service called Local Business Center, at which you can claim your business listing, and ensure that it is correct. You can even create online coupons!
I recently wrote about Google Profiles, a similar service for individuals. In another article, I included links to creating company pages on social networks like LinkedIn, Facebook and Yelp. (Note to LinkedIn: Please respond to my inquiry about getting rid of listing for an employee that isn't ours!)
Take a few minutes to check out these links. It's always worth making sure that your search results are correct.
