Obedience training !!!! Very, very important and largely overlooked part of training a dog, Show up with a dog that cant be controled and itll get you black balled with some dog people, take it serious.Im 2 years into my first squirrel dog, a streak bred OMCBA cur. I grew up with retrievers- labs and chessies- and this cur is by far my favorite dog I've ever had in the house.
As far as training, my advice would be to get the best bred one you can find in whatever breed you want, spend the first few months of its life teaching it any obedience stuff you want it to be able to do, and take it to the woods as much as you can. The more its in the woods the better it will be.