TIP #1: TRAINING ALL THE TIME
Your pet is always learning, so be attentive to how your behavior may be influencing your dog. It's easy to unintentionally reinforce inappropriate behaviors if you aren't careful.
TIP #2: YOUR BODY LANGUAGE IS IMPORTANT
Animals are masters at reading body language. They actually respond to that more than your words. So focus more on what your body is saying and how your dog responds, and limit the words you use.
Jeff Dentler, CPDT-KA, IAABC-ADT, FFCP, CTDI