The hardest time I have is starting something new, be it a shot or a background. If I get all of the starting points knocked out real fast, I can simply build upon the foundations little by little.
Here is a background painting of the junkyard which plays a pivotal role in the movie.
And here are a couple finalized shots that will give a good indication of how the character animation will look. The green are for keyouts in post; they're not the actual final color.