My current project is actually designing a set of oracle cards (like tarot cards but original names and meanings). But I think it's really the same activity as trying to brainstorm the story. I feel like I need to put more (relevant) raw material into my mind to stimulate ideas, but I ran out of raw material. Already hit the bookstore, the library, and the museum, not to mention my own bookshelf and card collection. What do you guys do when your subconscious demands to be fed truckloads of images and symbolism?