[lisatodd]

exactly what tami said....make sure he is a good canidate for breeding. i see too many (so called) yorkies that don't even look like yorkies due to poor breeding. also, if you look thru this forum, you will see many parents of yorkies desperate for help b/c of genetic defects (due to non-testing prior to breeding).
also, you will need to be well familiar with whelping, pregnancy, and dangers of pregnancy.
believe me, i ventured into studding 2 yrs before breeding but i had a mentor who help me along the way. i helped and viewed the studding process at least 5 times before ever attempting to do it on my own. i assisted in whelping puppies as well.

my best advise along with tami's is to read all you can. don't attempt it unless your dog is a good canidate. know his lines (parents, grandparents) so that you know what colors, size, etc he could throw
THIS ALSO GOES FOR THE BITCH AS WELL
you need to be able to look at the bitch and tell if she is in standing heat
determine what to do if the bitch does not get pregnant (contract)
determine which days to do the studding on
know what to do once there is a tie
what to do if the bitch becomes vicious
be able to turn them end to end and make them comfortable during the tie
hold them if the bitch tries and run
ANSWER ALL THE QUESTIONS FOR THE BITCH OWNER. believe me, they will call you on a weekly basis to ask what? when? why? how? and you will need to answer those questions.
my kirby who i studded out to two bitches, the owners are still calling me with questions regarding the puppies. it is on going but you need to be there for them and answer all the questions they have.

it is not easy being a stud owner. you have many responsibilities. i think the hardest part is telling someone their bitch is not the standard and i cannot stud my boy to her. of course, they think their little girl is perfect but i am not going to add to the ever so growing problem of overbreeding of the yorkshire terrier.
i hope this helps