Instead of painting the background just black as black colored pencil can get, I started to add brown, purple, blue and gray. In an attempt to create depth and the illusion of space, I catered to "spots" that were happening. My awesome artsy grandma said an instructor of hers called these "happy accidents".
I spent a while looking and trying to match the tail of the cool lizard pictured and taped to the drawing. Often I have to remind myself not to be lazy and do what I know is what I need to do: flip the image on the compuer and print it out again, sharpen my pencil, step back, erase, look at what "you're" trying to draw (not your drawing), and try draw it somewhere else first.
Then I hit it with paint thinner.
Oh yea! Ryan asked me, "Is the jet being held?" I didn't want that impression, so I tried to add movement. With an eraser, I created some lines removed and some light lines added. Garfield comics are my inspiration for that and my "skills" were developed when I invented Super Bean, The Evil Can Opener and Queen Corn long ago.