Most days I manage to find 15-30 minutes (sometimes not all at once) to sketch, scribble, or steal something for no particular reason.
Follow the randomness at There Is No Dog, my online sketchbook.
If you are new:
This blog where I post new work - usually one or two posts per month.
My sketchbook is where you'll find something new every day.
My web site is an archive of published work - illustration, music, comics. For the most part it is older, out-of-print material (I am not always free to post new work and in deference to publishers or labels trying to sell a book or album, I usually hold off making new stuff available for free for some period of time... but everything ends up there... eventually).