I know there is somewhere on here a guide for painting lightsources and lighting effects. I am going to be painting some skeletons and want a blue glow from their eye sockets. Could someone show me a guide to this.

Here are a couple of articles from Coolminiornot:

Glowing eyes by Cyril (http://www.coolminiornot.com/article/aid/288)

Painting lighting effects by Victoria (http://www.coolminiornot.com/article/aid/288)

If you manage to paint like them, you are ready to win the Slayer Sword ;)