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.
Tell the tale of a clock maker who works with an unusual material.
Do enjoy learning about how things work? Have you ever reverse engineered a motor? Something less tangible, like a story?
Write an article or blog post explaining how to do something you do well.