"Work in Progress" thingy of "Big Hand strikes again" [link]
I don't always work like this (starting with grey tones) and I go through a lot of trial and error. I'm not too organized through the process, although I like to keep layers tidy (possibly), even though the main image is flattened: creatures and background in a single layer.
Only little things like spears, hair, smoke and other effects are on their own layers.
Hopefully you'll find something useful in this. It's kinda cool for me to see all the main steps too