I draw my cartoons using a drawing tablet. Actually, I have two. One is a Cintiq, which I use at home, and is a tablet and monitor combined.
When traveling, I use a small Wacom Bamboo, which packs away easily with my laptop.
It really does mean that I am able to accept commissions, draw cartoons, and email them off to clients pretty well from anywhere in the world!
Yes, I know it's a great job!