To whet your appetite and keep your writing fingers limber, take a good look at the photo, or let a prompt settle in your mind. Set a timer for a reasonable amount of time, be that five, fifteen, or thirty minutes. Then start writing.
A young magician trains with an instructor who reveals the secret sacrifices one must make to master the craft. What are they?
Write about the places where you find magic in the real world.
Explain how to perform a basic card trick.