go out and practice. make sure you have the right size stick!! when you buy a stick, don't pay attention to the sheet of paper they have saying what size you'll need for your height. the rule of the thumb is that the top of the stick should reach your hip. my legs are a bit long for my height so i have to use a bigger stick.
when you're shooting, hit with all of your frustration. think of something that really really pisses you off. my coach told me to try that a longgg time ago and it's worked ever since!