Drawing makes the commute much easier to cope with. Here's a sketch of David Llyod George (British prime minister during the first world war) I drew on the train.
Sphere studies are great for practicing light and shading. Sphere studies are very unforgiving as there is little to no detail to cover any mistakes. I think it makes good practise to draw them freehand.
I find trees a facinating subject to sketch. They're full of character but stand very still for you.
I'm studying classical drawing so I'm following the techniques taught in the atelier schools. This was fairly sketchy for a Bargue Plate not using much measuring at all.
A statue of Euclid in an Oxford Museum, the sun light was moving across his face and I wanted to challenge myself to chase the sunlight.
The task was drawing very quick interpretations of a human skull. The skull was rotated by the tutor every 5 mins. I drew this one upside-down and was surprised to see how it looked once it was rotated.