"Welcome to the Party, Pal!"
Elves are a crutch... dwarves just as much....
Totally avoid khemri and slann... keep your respect in touch!
TuernRedvenom gave the old 2nd edition system and it's a good one: my skaven have the forward quarter of the ring in this scheme, with the player number in the middle, in black....
The other method is using distinctive position miniatures: There's no confusion when you face my Necromancer team.... Zombies look like zombies... the positionals (golems, werewolves, wights and ghouls) are from the same manufacturer, respective to position, and though different poses they resemble each other.... You can see this at my website:
http://graveyard-gothika.webs.com/necrominiphilia.htm
Hope you enjoy the greatest game on earth!