I met a man who told me that he has a section of his store where he displays the work he does for his clients. His reasoning is this - it let's prospective clients see what he can do and provides exposure to those companies.
He's hoping that those clients receive business from that exposure. What a great idea! Think about it. Now he is adding value to the product/service he provides. He cares enough about his clients to give them some free advertising. And yes, it helps him too by showcasing what he can do for others.
What are you doing for your clients - outside of the product/service you offer? Think about it.