I think the balance is 80% meat, 10% bone, 10% organ and such.
I think Chicken is a good thing to start with when you're making the switch since it can be easy on the stomach.
You can use pretty much any type of meat. If you have ranchers around or anything that kill their own stock that's a good place to go to. Get the things they can't/won't/don't use. I know someone who got an entire. Calf. From a rancher because he lost it and didn't want to waste it.
Duck, rabbit (though not often because they lack fat), chicken, beef, pork, fish, sheep, hearts, livers, feet, tongue... pretty much whatever.
Here's a couple links to some info. Feeding Raw - Where to Start?
This is a thread that has LOTS of information on feeding raw Raw Feeders: Please post typical weekly menu
This is info directly from raw feeders Raw Feeding Picture Thread
and here's pictures ;D
Also, you can buy pre-made raw that is already portioned out and bagged. (BARF diet)