You need to create a nice consequence, when your dog does something you like, so that they do it more. Just like training a muscle at the gym or learning any new skill, it takes repetition. We also call something nice, a reinforcer.

Think of training your dog as a bit like bringing up a child. It is a progressive experience that spans the entire early, adolescent periods and into adulthood. Unlike our children who move out and look after themselves, our dogs are our children for their entire life and can learn bad habits at any time.