Designing invitations is one of the business ideas in the printables industry that requires you to be a less passive seller. This is because you would have to customize the invitations with the customer's information. To learn how to create invitations to sell on Etsy, check the tips we gave under this subheading: “How to Make Printables to Sell”. You can offer various templates for each of the following ideas and more: 1. Anniversary parties 2. Baby showers 3. Birthday parties 4. Graduation parties 5. Halloween parties 6. Weddings