To write a 'this bites fanfic', begin by studying the source material closely. Notice the writing style, the pacing, and how the story is structured. When you have a good understanding, think about what you want to add to the 'this bites' universe. Maybe you want to introduce a new character or a new location. Outline your story before you start writing. This will help you organize your thoughts. As you write, focus on character development and making the story engaging. Use vivid descriptions to bring the world to life. Also, don't be afraid to get feedback from other fans of the 'this bites' series.
First, you need to be really familiar with the original 'this bites' story. Know the characters, their personalities, and the overall world - building. Then, come up with an interesting concept. It could be a new adventure for the characters or a different take on an existing event. Next, start writing and don't worry too much about making it perfect at first. Just let your ideas flow.