A stack is a great inspiration tool when you’re looking for what happens next, especially when you run a no-prep style game. When you’re thinking about what comes next in play, just pick up your stack and go through it. You might find something that inspires a whole scene, especially if you keep up-to-date notes.
I’ve been using index cards as a GMing tool a lot this last year. In July, I posted about using them to create adventures in your downtime. I’ve since found new uses for them and brought everything together in this post.