At the moment, I am giving away a smaller version product as I want the customers to continue using it. They love the product and get hooked on it. When I send the packages, I write a handwritten thank you note, and I follow up with the customers. Sending out newsletters every month is also another way of retaining customers. This way, the customers will remember you and come back when they need the products. Keeping in touch, answering questions or comments on social media is another way of retaining customers.