Develop a referral program. Just like in other businesses, people who are referred by others are easier to convert to a sale than people who weren't, because they're usually coming to you with some interest in buying. Many people you talk to won't be interested in buying right away, but they might know people who are. Happy customers may want to share your product or business. You can develop a referral program to give people incentive to refer others to you. For example, you can give them a 10 percent discount on their next purchase for every new customer they refer.
As a last resort, you could try cold calling by phone. This is probably the most depressing and soul destroying activity on the planet. Even if you get past the usual questions such as ‘If you’re selling something – I’m not interested’ and ‘How did you get my number?’ you need a really slick and professional script and the ability to recognize and avoid lonely old ladies who just want to interact with someone, anyone, in fact.