Well I am really torn if I should call this a tutorial or a step by step. But let's call it a tutorial, (makes me feel better) Take a look at the steps and notice details. What I do first and what I find important.
One tip is to divide things into layers. Like Hair Cloths, eyes, mouth. and when you really feel satified I tend to merge layers together and paint on top of them.
Well If you have any questions I'd be happy to answer them.