Do you have a particular crafting skill that you'd love to share with others? Maybe you're good at sketches and can make custom sketches for people from photographs. Perhaps you're a good fantasy artist (like this old friend of mine ) and would like to sell some of your art. Maybe you make handmade metal signs or keychain fobs. Perhaps you like to knit scarves.
Whatever it is that you like to make, you can sell it on Etsy.
It's pretty easy to open a store on Etsy ; you mostly just list yourself on there and then list a few items you're selling, along with photographs of those items and a reasonable price for them. Describe those items well and people who are searching for interesting decorations or items to buy will find it.
Not only that, once you have items listed on Etsy, you can discuss them elsewhere. Post those items on Facebook for your friends to see and share them on other discussion forums you participate in related to your hobby.