Colletts on the Move

Do you use writing prompts? I love them for creative exercise. Here’s a fun one I copied directly from Poets & Writer’s email newsletter:

Choose three people who you know well and write a detailed character description of each one. Now change the gender, name, and a few physical traits of each one. Begin a story with all three characters standing in the rain outside of a house on fire.

If you use writing prompts, where do yours come from?