Where is your business, how do customers get in touch with you? Going back to fundamentals - the internet is not for a bunch of geeks and hackers, its very much mainstream and its a communication highway.
Communication is a two way thing. You may be communicating with your customers via your website, or at least you are providing a message, how well you do that and the response you get turns it from a message to communication. One of the simplest, easiest things you can do to encourage communication on your website is to make your contact details easy to find.
Email, fax, telephone or even a letter - each person, each of your customers will have their own personal preference for contact. You could put your contact details on every page or you could have a prominent link in your menu/navigation that says something simple like "Contact Us". Use a phrase like "Location" or "Info Centre" and you could confuse your website visitor and make them stop and think about how to contact you - in that moment you may lose them, another business like yours is only a click away. Use a phrase that everyone understands like "Contact Us" or "Get in Touch" a phrase so common on the internet that people don't need to think about it and you are the business that receives the lead.
Having all your contact details on your website and making them easy to find enables more people to communicate with you - more leads from your website which in turn leads to more sales.