[header] How to write fantasy fiction [title] Choose the kind of fantasy you're writing about. [step] Decide whether you'll write about a medieval, futuristic or any other type of era. Take the time to imagine your fantasy world and the characters within it. 
Take notes or write an outline of how your fantasy world works. For example, if you have included supernatural creatures, are there special rules they must live by-like vampires avoiding sunlight.