I am fortunate to live in an area with lots of quilt shops. the two guilds I belong to in this area ask for door prize donations from the shops. One guild only asks once a year for the whole year but I don't know about the other one. They usually give a $10 gift certificate or a book/pattern or charm pack. Both guilds list which store's donated that month's prizes in the newsletter and my current guild includes a thank you card in the prize envelope for the recipient to send to the store.