Assignment #23: Zoom in or out while taking a picture.
If you hold your camera body reasonably steady and twist your zoom lens while shooting, you create the rather chaotic excitement of straight lines converging in the center of your sometimes-rather-abstract photo.
I imagine this can be done in post, but where's the fun in that? Also, I'll acknowledge that these pictures may create a short-lived "wow" factor. Still, it's something to try when you have a colorful subject that just isn't working out.