There's nothing better than finding someone that "gets" your idea, artwork, whatever. I signed up as a vendor at a girls' night event at an all-girls high school last week. And they got it; especially the younger crowd (yes!).
I didn't do much prep work but I did sit down one day and made lit'rally 100 small fabriano cards. The cards are beautiful anyway and I simply tore paper from one of my vintage sewing books and stamped them with either "love" or "happy". I am crazy for these cards. And so were the shoppers. I sold every single one.
Now I need to make more for myself.