Dog is on a leash and pulls the leash tight to sniff where it pleases as the owner talks to another human. This is bad leash manners. Asking the dog to wait patiently would provide the dog with a mental challenge, which all dogs need.
What NOT to do with your dog
Owner corrects the dog by yelling the dog’s name over and over again, but never actually addresses the dog with any type of body language. The dog does not know what it is the owner wants. There is no follow-through. Human proceeds to have a conversation in human words with the dog, stating they are going to put the dog in the truck. This human needs to speak "Dog," not "Human." On top of that, one should only use a dog’s name for positive things so the dog associates his name with something good.
What NOT to do with your dog
Owner allows their small dog to greet a human by putting his paws on a person's leg. In the dog world this is not a respectful way to greet another being. There is no difference between that 5-pound Yorkie and that 90-pound German Shepherd in regards to the meaning behind the behavior.
What NOT to do with your dog
Owner corrects a dog long after the deed was done and the dog has moved onto other thoughts. Whatever the dog is doing at the moment you make the correction is what the dog will think you are upset about.
What NOT to do with your dog
Dogs only being corrected 'some' of the time. Bark bark... Allowed... Bark bark. Dog’s name yelled. Bark bark. But no real correction, no body language used. No follow-through, no real communication, no consistency. When you are not consistent your dog will not listen to you as she will know that 'sometimes' she is allowed. Also, the dog’s name should not be used in the correction.
What NOT to do with your dog
Dog is walking slightly in front of the person holding the leash. Then the human expects the dog to ignore other dogs when LETTING the dog lead. Mixed signals—you are my leader, but listen to what I say. Do you know how confusing that is for a dog?