One of the best and easiest commands to teach your dog is “Sit.” Until your dog is fully trained, the “Sit” command can be used to help avoid things like puppy jumping on people, straining on the leash when you’re stopped, and many other things. It’s the first thing I teach my dogs, and while they may not do it perfectly all the time when they’re very young, if you use positive training techniques it an be used to help get their attention and then to learn a wider variety of commands. One of my favorite trainers has this great video on teaching puppy how to sit.