Lesson 5 in Wil Freeborn’s book suggests drawing, then painting, the stuff in your pocket (wallet, keys etc.), so I emptied my purse. These are just a few of the many things that came out. Yes, that is an old flip phone.
Lesson learned: the more you draw, the better you become at capturing what you see; making a single, confident brushstroke is very effective, so it’s worth pausing to be sure before touching brush to paper.