Pick a type of writing that, by definition, has a particular structure— a recipe, a prescription, a syllabus, a food review, a warranty, a contract, etc. Then, using that structure, write about something completely unrelated to and unexpected in the structure.
For example, write about how to build an app, but fit it into recipe format. Or, write about taking a vacation but in the format of a contract. Or, write about going on a date, but in the format of a syllabus (lol). You get the idea, and you can come up with something creative as hell. Go.