The Internet is an information resource. You can find information on any topic you wish, add to the information by writing informative articles on aspects of your business and post them in other sites on the Internet.

If you include links to additional, relevant pages on your site using keywords, then the search engine spiders will find your site. 
Remember: do not post the same article in multiple places as you could be penalised for posting duplicate content on the Internet. Google penalises duplicate content.

Using social bookmarking sites such as Digg. If people find your site useful here, they can recommend your articles to others. This is a good way to gain visibility for your articles.

The same applies to Press Releases. There are many sites that allow you to post your press releases - again creating visibility and links  to your site.