thought i would get this one rolling again...a few things i would like to add over my years that i see hinders a good huntin dog.
1) Don't over command/correct (as others said, keep your mouth shut)
2) be very careful how you discipline and reward certain situations as to not give the wrong impression to the pup.
3) patience is worth more than words (these dogs we work with everyday are natural born hunters and your goal is to help improve and polish skills they already have...)
4) don't expect too much (every dog is different, some pick up things faster than others)
5) sometimes the dog gets "it" and they get bored, so you get upset thinking they are dumb, when in fact, you missed the point where he did what you asked several times and now he is on to something more fun!!)
6) Back to patience... during training, be sure to give your pup plenty of time to figure it out for himself. If you are playing hide and seek with an old pheasant hide, be sure to allow that pup ample time to find it. (review number 1 again)
7) most important - Don't you ever forget to praise your dog out in the field. Make sure they know you are proud of them.

you say a command only once and if they do not respond, you discipline. You will thank me for this some day while your friends are patting their hands and legs to get their dogs to come...
9) Take care of you pup, and be sure to give them structure, like having a place to come into the house on a bed and then make them lay there for the night, if they want to get up and run around, then they go back outside. Dogs need structure just like kids.
10) Last but not least... did i mention patience???