Inspired by the sketches of Kevin Keele, I've been doing lots of cafe sketching in between jobs. I LOVE IT! I use a rough toothed, recycled paper with a simple black pen and white gel pen for highlights. Not only does it give me the ability to address my lights and darks, but I find the entire process a much more fulfilling experience. I can work on shapes as well as tonal studies, and at the same time end up with a "finished" style that I find quite appealing.