Putting Cutting-room floor ideas into the Margins

What do we do with all of our many Wish List ideas that don't seem to fit anywhere in our stories? I write down a lot of ideas that end up in notebooks, and then just sit in those notebooks, possibly forever. Here are two examples of where such ideas can go--in the margins where they don't have to interfere with the main story. Audiences can go back and look, if and when they want to. The Simpsons did this whenever panning from one room to another, or in a quick exterior opening scene, where something topical would be written on a sign, or buried between walls or underground.

Image from The Good Place, Season 2 Episode 6 (5m34s)