1) No matter how well trained your dog is, put him on a leash when in public and near strangers. People will appreciate your respect for their safety and well-being.
2) Avoid approaching people or dogs head-on when in public. Move off to the left or right to pass by; step off the curb if necessary. Fearful dogs and fearful people will be thankful.
3) Always, when there is a leash in hand, put a poop bag in your pocket. Carry three: one, a spare, and one to share.
4) Leave your female dog at home when she is in season. Her pheromones will bring out the worst in otherwise well-behaved dogs.
5) Ask, and be specific, before letting your dog approach people or other dogs. "May I let my dog greet yours?" allows an owner to back out of a possible confrontation if his dog is fearful or aggressive. The biggest mistake I see people make is asking someone else if their dog is friendly. If an owner replies yes, this is NOT giving you permission to let your dog lunge forward to meet the dog.
6) When you have been invited to a home, event, or activity, ask before bringing your dog.
7) Until your dog is trained not to bark and jump on people, put him away when guests arrive, or leash him up and step on the leash so he can't jump. Let him out after guests have settled in. Keep him leashed or tether him if he tends to nose, poke or paw people for attention.
Your dog would want others to think as highly of him as you do. Don’t disappoint him.