Colouring using Copic Marker:
Fist of all you need to select which type of paper to use. Different paper got different absorbing amount of ink.
Normal plain printing/photocopy paper seem to work fine for me, so I photocopy my original drawing (about 2-3 copy just in case).
Using your visual art diary paper is fine with Copic, but water colour paper is best for blending colours and layering without leaving blotch.
Anyway lets get on with it. Once you've chosen your drawing and photocopy it, you can either do a rough colouring with colour pencils just to give an idea of which colour to use.
I this tutorial, I'll use plain photocopy paper. This is the minimal colouring for saving your copic ink (I'm kinda poor and the Copic Markers are expensive). ^___^;
Now for skin, I chose:
-E00 (Skin White)
-E02 (Fruit Pink)
-R02 (Flesh)