Start here...but my suggestion would be to just read for a while, before jumping in:
http://www.yorkietalk.com/forums/die...-learning.html
I feel premade raw, which I love. I can see why you'd consider making your own - prob save a lot of money....but be careful; you want it to be balanced to avoid causing health problems that would cause way more $ and heartache; this is true w/ any homemade diet..ya just gotta do a lot of research.
Also, there are a lot of brands out there now who have a "just add the meat" selection too. Meaning, you buy a pre-balanced dry mix - and add the meat as instructed. These would be balanced from the get go.