the best trick you can possibly pick up is the following, if you can do this, you will get your bird 99% of the time when he comes in range, and that is:

LEARN TO DRAW YOUR BOW WITHOUT MOVING!!

no really, the movement is the hardest part to avoid.. get that thing back when he is not paying attention ie: behind a tree, or you can draw it early and then hold it till he gets close.. Good luck!