I would say brush teeth daily
and low fat diet as i almost lost my boy yorkie at two to pancreatitis and it is prevalent in the breed so watch the treats and food your little one may drop i would try to minimize that - oh and it is very costly to treat

and life threatening
and 3 for me I would be more cautious of where i got my yorkie next time
for you number 3 would be to be real careful with your little one as yorkies are fragile and dropping them, etc can cause serious injuries that can be costly and long term damage
Also setting aside a credit card for vet care or a fund where you put money aside monthly for care or getting pet insurance as i had no idea how expensive health care cost when they get sick