I am a sucker for videos that show the evolution of an illustration and similar works. I recall my joy at the MillionMasterpiece site and the ability for us to play each square. Youtube is another great source of such things, but this new site, Sketch Theatre, is specifically geared towards this idea. It showcases some talented artists and we see how it all comes together through a cool interface:
I have only had the time to watch a handful so far, and all have been top class inspiration.
Check out Monk One's work to get you started!!