Doodling a lot in my sketchbooks, so when a deadline approaches I can flip through all those sketches for inspiration.
My main client at the moment is the belgian newspaper De Morgen. When they call me, I start sketching for half an hour – an hour, let them pick their fave idea, and then I usually have 3 to 6 hours to finish the illustration. I really like the ultra short deadline, it helps me come up with lots of ideas.