Breathing: Take a few minutes to do some deep breathing relaxation techniques. Potion: Write about a magic potion. Seasonal: Write about your favorite season.
Light Switch: Write about coming out of the dark and seeing the light. Should more high schools have apprenticeships or technical programs so people can get a job right out of school? Write about what they do and say. Capture your feelings about this in your writing.
Don't worry if a great topic doesn't immediately spring to mind.