I know this has been asked before, but I cant remember the replies. How do you keepyour hand steadyenough at 40 yards to consistantly put an arrow in a 2" circle?

Im having trouble with my old fred bear bow. The biggest problems include a long drawlength,inconsistant releasing (I dont use a release aid because ofthe long draw length), and only about 20% letoff (Its a 60# bow). Im able to hit a pie plate at 20 yards, but at 30, the arrows tend todrift all over. I can usually hit a sheet of paper 3/5 times at 30. Do you have any suggestions to help tighten my groups or should I just keep my shots within the 20 yard range untill Im able to buy a new bow?