Well first, get the right spec, this is one i make while using a laptop mouse pad with my nose.
http://www.wowhead.com/talent#ouIRRkRorRRosoZR
Secondly arrange your action bars in a specific order, this will make it easy for your rotation. Below is a picture
Now pick up your keyboard, and roll your head on the keyboard.
This is why mages become fun, it becomes like a game of russian roulette because you can sometimes hearth out of boss fights
As you can see, be sure to put arcane blast everywhere. The most places you can add it the better.
http://img59.imageshack.us/i/howtomagelol.jpg/
If the pict doesnt work