Go check out Mark Kennedy's blog on keeping a sketchbook. A fantastic post to be sure that is well written, thought out and INSPIRING! Please, do yourself a favour if you haven't already read it, go and read it!

These particular 4 weren't drawn out in the public, but were instead done in front of the television while watching a couple of movies (on different occasions) in my trusty little (4x5) sketchbooks. The paper takes prismacolour beautifully in my opinion and happens to fit nicely in my pocket for those 'just in case' moments when I'm out and about.