Got some characters looking for a story? If they work in fantasy realms, your search is over: hit up Project Gutenberg for a complete set of the Andrew Lang [COLOR] Fairy Books. Read at random until a story catches your fancy. Replace the main characters – or supporting ones! – with your characters, and see what kind of a delightful mess they make of it.
Bonus points: mix in some bits of other stories. Hey presto, people will start praising your “originality”