Leonardo da Vinci used to suggest that art students “look at any walls spotted with various stains,” so as to “arouse the mind to various inventions.” Sandro Botticelli liked to throw a sponge wet with colored paints against a wall, then search out new landscapes in the resulting splatter.—Lewis Hyde, Trickster Makes This World
I switched from coffee to tea at work, so every morning I take an index card and set my tea bag down on it, letting the card soak up the tea. Then, I shop for images on the card, and riff off those with some doodles and captions.
Nothing serious, just fun way to pass a couple minutes and find some ideas. You could probably do it with coffee rings, too. They’d be like little ensos.