Event marketing is pretty low hanging fruit. Create an event or meetup to target your small business customers. The event should be a based on a topic of interest to your customers. ie. A panel talk by local entrepreneurs giving growth tips. Also include a small networking reception as part of your event. As host of the event, you have the advantage of telling the audience more about your company and services during the introduction. You can make the events monthly or quarterly to ensure that you are constantly engaging with your customers.