Join a Web Banner program like LinkExchange or Doubleclick to drive traffic to your site. Don't forget to add your web url and e-mail address to all business cards, company letterhead and advertising media. Couple your online presence with your normal advertising mediums. For example, it you normally advertise in newspapers or magazines, include your URL and e-mail contact. Join your local Better Business Bureau and Chamber of Commerce.
Online stores receive high marks for solid business practices.
If you own a brick and mortar store, put up a web site and sell items over the internet. This will allow you to have more than one audience. Every business on the web is a global business. Target websites that promote sales of items that you sell. Do not send junk e-mail to users that have not asked for information.