We use facial expression and sounds that come from above most dogs. Many dogs will body slam or attach a paw as they jump. This type of dog craves body contact. Even the most mild mannered dog, if not given enough stimulation, can jump and behave wild. Please read Name Game Article.
Attention is so important.
Step on the leash this leaves your hands free to give hand signal for sit or down and also to reward with cookies from your pocket. Stand up keeping you foot stepping on the leash and refocus your dog perhaps towards his toy basket. When company comes place your dog on leash and start working him before company is expected this can be set up in a mock situation as well. Step on the leash and reward good behavior. I can't stress this enough.