Create a system that generates referrals

Identify your existing, ideal customers
Use an email marketing system (MailChimp, Mailerlite, Infusionsoft, HubSpot, etc). Include any customer who places one or two orders in an automated campaign.

Give them a reason to spread the world
Have the system offer them a PDF or video they can pass on. Explain that the content will be helpful for their friends to solve a specific problem.

Offer them a reward
Have the system offer them samples of your products, or a bonus.

Use affiliate commissions
Give customers 10% commission on the orders they bring in.

Opt customers out after placing several orders
Make sure the system does that automatically, as you don’t want to risk annoying people.