If you are starting a business for the first time there's a wealth of support and information available including online groups. If you plan to sell on Etsy, you will find many tutorials available to get you started. You'll also find a wide selection of books published on the subject of running a successful handmade business. When looking at books, make sure you find books that are up to date. The market for selling handmade cards and other products is constantly changing. Another great option is online training and workshops.
The presentation of the cards—the packaging—helps make a successful handmade card business. A card that is neatly presented in a cellophane envelope looks more professional and can command a higher price than one that is unpackaged. Presenting cards in some form of packaging stops cards from becoming dirty or dog-eared and it also gives the ideal opportunity for further marketing. A label on the back with your phone number or website address could help you solicit further orders. Remember to consider shipping and packaging when factoring the costs per unit in your pricing formula.