How To Write A Fantasy Story . Before you jump into your worldbuilding, character sheets, etc., establish the kind of system you’ll use to keep track of it. They just have to be compelling. How to Write Fantasy Series Do's and Don'ts Now Novel from www.nownovel.com To that end, consider the following tips for writing a fantasy novel: Begin your story in a very specific way. With these elements in mind, here are 5 important fantasy writing tips: