How do you Doodle

When you draw on the computer you work in layers. With paper and pencil I draw a quick sketch, and scan it onto my computer. Thats the drawing on the far left. I put a clear LAYER on top of this sketch (just like tracing paper) and draw the image I really want (That's the middle image). Then I DELETE the original pencil sketch - leaving only the clean computer drawn image (image on the far right).

Then I color it.