The Biggest Mistake i see with folks training for the first time is too much too fast.
Training a dog is like a puzzle you first start with all the peices then you start putting them together.
Starting early is a key. You get to harness more natural abillities that way
Consistanceyin your actions and the dogs
Contact, Repetition, Association
Small steps equals big gains in the long run
How much and when makes a big difference