First of all, while I agree there is a lot more to think about than grooming and clothes, I just want to point out that the op may not know what kinds of questions to ask at this point. When I came here all I knew was they were cute and small lol. They may not know at this point why people recommend a puppy is left with it's mother until 12 weeks, or that they need to do anything differently aside from what their vet has told them about feeding her. I've learned a little about these things just reading here and there on this forum, but not enough to feel confident giving advice on them.
So, my advice is read everything you can find about the breed, health problems, development etc. There is a ton of information here, and a bunch of breeders that might have a better idea what to do to help such a young baby. Explore the other forums too,grooming, breeding and such,there may be posts about caring for a young puppy, and if you find something you don't understand or have more questions about don't be afraid to ask

Some issues tend to set people off but they really just want to help.
Also where the op posted about breeding they were considering it in the future, not saying they intended to do it. Frankly that doesn't seem that odd to me. I thought about it myself before I got Yumi when I was just starting to consider getting a yorkie, but realized pretty fast as I read up on it that I wasn't ready for something like that... Most people know very little about breeding any dog let alone yorkies. Before you realize the danger it puts your dog in and the work that goes into it is seems like a fun idea. Puppies everywhere just like the sweet little bundle you just brought home... The IDEA of breeding appeals to a lot of people, it just doesn't match up with the reality of it I'm sure :P I think a lot of people having heard the risks wouldn't want to breed in the 1st place.
There is a sticky on puppy care on the general forum
http://www.yorkietalk.com/forums/gen...w-parents.html
Hopefully some people that know a little more about the young ones than me will have some more specific advice.