I accompanied my wife to a dentist appointment hoping that I would be able to sketch something while waiting for her appointment to finish. It took a while for me to find a subject. My legs were crossed ... and problem solved. I drew my left shoe. I was wearing it when I was sketching it. I added the shadows when we got home.
It was raining so I just looked for something to draw from inside the house. Something new and something that would require shadows. Something with details ... I found one of my son's action figures and decided to draw it for Day 13.