Make sure you train your customers. Create a series of seminars both online and offline that help them learn. Demonstrate how others are using their software. Better still show these customers a bunch of case-studies. People just like them who started up with nothing and have used the software to make their Caribbean cruises and Martinis a reality. Teach the customers some marketing skills if you have to. Have a monthly/yearly award ceremony with nice, fancy prizes for those customers who create most income with the software.