TIP #1: YOU DON'T GET WHAT YOU WANT, YOU GET WHAT YOU CLICK
Use marker training to mark the instance your dog does something that you want, and follow it with a high value reinforcer to raise the probability that the behavior will be repeated. Clickers are the #1 choice for marker training, but you can use an emphatic YES! or other word to let your dog know what he did was correct.
TIP #2: LEARN YOUR ABC'S
Every behavior is preceded by an antecedent (an influential event that comes before the behavior) and is followed by a consequence (an influential event that comes after the behavior, i.e. reinforcement or punishment). By controlling the antecedent and consequence you can change behavior. As easy as A(ntecedent) B(ehavior) C(onsequence)!
Jeff Dentler, CPDT-KA, CTDI