Process: seeing how other people work

Work In Progress: is a great place for processes. They are also quite large so you can get a good look at how they are done.

Slam Blogsma: this blog by Sam Bosma has loads of thumbnails and sketches and shows how he goes from these to digital colour and texturing in Photoshop.

The Unreachable Itch is a blog by illustrator Jonathan Burton. He also posts character sketches, sketches to line work and colour finals.