How to skin Faces???

well one thing about skinning that i think is tricky is the face. i see skins like eggs with the ghoul bear, and the detail on the face is amazing. so the question is , how do u do that, what kind of tools can one use to make small details like that, what type of brush sizes, how far in should u zoom in to get the best results when free hand drawing on the face, ect.... i just need alot of tips on how to get good detail on the face. thx ^_^

look at face, shade and highlight in the right places. Dodge highlights, and burn shades, you can also blur. Look on another skins face and try to copy its main componants.