Start with the customers you have and ask them to recommend your products to their friends and customers. Offer them specialties, coupons or discounts for recommendations. Let your satisfied customers be your marketing voice, they know, why they bought, this will convince others.
Don't wait for recommendations to arise from somewhere, promote it!
This way you stay in touch and communicate constantly with your customers. Don't count on communication channels (social networks, facebook, emails), ask your clients how they like to communicate, this way your reach them.