As a behavior analyst oriented person, I appreciate and agree with McKenzie’s behavioral suggestions. If you really want to get into it, there is a book, “Don’t Shoot the Dog” that might be helpful.
I would add that it is important to take in to account the behavioral tendencies that have been bred into your particular dog, in order to best provide for his/her psychological needs and to better understand what is reinforcing and intolerable for him/her.
One other thing, is that all dogs share a common trait. That is they have uniquely evolved alongside of humans, throughout their ancestral history. They are thus, extraordinarily attuned to human emotions as expressed by us (often out of our own awareness) through vocal tones and body language. If you and your dog are having problems, despite your positive and rigorous behavioral training, you might consider how you are coming across to your dog on your own subconscious level.
Or if you’re not into all the technical stuff, you could just try loving, spending time with, and nurturing your dog, and you’ll probably be just fine.