With Google Places for Business, you can add salient details about your business to Google's database without paying Google a dime. And not just name, address, and phone number, but business category, hours of operation, types of payment accepted, and areas served. The information, including a small map, appears in relevant Google search results.
Google Places previews what your listing will look like even as you provide the information in a questionnaire. While this service is free, Google does encourage you to increase your business's visibility by buying an AdWords ad, but the sales pitch is low-key.