Whoever said "If you build it, they will come...." or "Build a better mousetrap, and the world will beat a path to your door", is full of "Bull-Sh-t".
You gotta get out there!
Hob, knob, network, clubs, associations, non-profits, pass out those business cards, shake those hands, donate some print to a good cause!
Me, my technique is to try and get a meeting to learn about what their business does, what their challenges are, and, just to basically BS for a little while. You'd be surprised. Most business owners are very proud of their venture, and, will jump at chance to show it off. I'm not there to "sell" them anything, and, I make sure they know that on the initial visit.
My job is to observe, and, see if, and where, there are any mutually beneficial opportunities where we can help them out, and, they can help us out. They can buy print or mail services from anybody. However, an "ally" to help him/her succeed, we'll that's a whole different matter..........
-Best
MailGuru