The good thing is you have a lot going for you from the start, people always want something, and the more common your product/service, the more likely you are to get a phone call.
Example, take a kitchen company, every house has a kitchen, there is a high chance that they will need to update their kitchen soon, our job with the leaflet design is to make your company the people they phone.
Does your business require leaflet designs that get phone calls, the sort of design that gets read and remembered, do you want your business leaflet speaking to your customer to build more confidence and trust that drives more phone calls!