There is a 20 minutes challenge offered by Mary Gilkerson. You start a buzzer and when it is over you are done. I am such a goody goody two shoes that I put down my brush in mid stroke. I am so impressed with myself with what I did in 20 minutes because I am not a landscape painter.
It looks like a road, it has a car and the rocks even look like rocks. Boy I wonder what I could do in 25 minutes.