Propp’s elements of fairy tales are an essential tool for any storyteller. If you haven’t heard of Propp and his ideas on the structure of fairy tales, do yourself a favour and read this.
Next, try this Proppian Fairy Tale Generator out. It creates some unbelievable combinations of story for you to play with. I’m a fan.
The ideas that the generator comes up with are excellent when you’re looking for some inspiration to play with a story’s structure. Don’t go too crazy, though. You may hurt yourself.