Contract, Expand

One of the little tricks illustrators and artists sometimes do is draw something bigger than it's final presentation is going to be; this is especially common with mass produced stuff like comic books and things. Drawing big and then reducing it can make the art look more detailed, with the added benefit of making medium mistakes look small and smaller mistake disappear.

However, I've found it's just as rewarding and sometimes more more fun to go the other way, which is  to say drawing something quite small and then blowing it up big.

Rather than making your mistakes less noticeable, it instead makes them seem almost intentional, as though the drawing is organized by some weird principle. The accidental textures and variations add subtleties and complexities that usually commercial art tries to hide. Makes it more expressive and less slick.

As I said, fun.