The best way to build a nice list of prospects is to know the people worth knowing. The easiest way to find these people would be through other businesses. Local business owners are great prospects that you could collaborate with, and since they're located near you, you can conveniently get in touch with them as well. Give them a call and set up an appointment. Make sure you walk into that office with a game plan of what you're trying to achieve from that collaboration and make the terms of your networking clear.