I like giving away stories. They let me cover things that can't be covered in the novels and for me they're like extra seasoning packs to go with the story. They may not add to the main narrative flow, but they certainly add flavor.
here are four examples you can look over at your leisure, if you are so inclined, all related to my SEVEN FORGES series.
FROM THE MOUNDS
WHEN KORWA FELL
James A. Moore