I checked out two books on selling homemade crafts. One is The Handmade Marketplace: How to Sell Your Crafts Locally, Globally, and Online by Kari Chapin. The other is called Crafty Superstar: Make Crafts on the Side, Earn Extra Cash, and Basically Have It All by Grace Dobush.
Both books talk about everything from naming your business to packaging the product for shipment. You'll read about online options, local options, and craft circuit options. The authors talk about supplies, taxes, and what to do if someone copies your product.
If you have an idea that you would like to live off of your craft or make a little extra money with it, these books might help you get ideas and get started.