From a doodle to a finished drawing

I usually end up drawing cartoons when I sit down with a pencil and paper nowadays...

I originally drew this Boston Terrier cartoon much smaller as just a doodle, but I liked it so I enlarged it on the copier then traced the outline in pen, copied it again, then shaded it with graphite pencil. By using the copy machine this way I can save the original outline in case I make a mistake with the shading or I feel like coloring it in with a different medium.