They are fortunate to harness ability, talent, and work ethic. Do the simple things perfectly and work on the things that need adjustments. Don't overdo everything, just focus on one aspect at a time. A. Everyone, and I mean everyone, has weaknesses, but they are all different. You must know and study your opponent.
Some goalies are good at stopping shots, but give up too many rebounds.
Others are good with their feet and certainly there are some who aren't. Start by studying their position in the goal and by their physical attributes. Tall goalies have trouble getting to low shots, for example. Finally, study the way they warm-up as well, but remember, if a goalie has a bad game once, he might come back and have a blinder the next time out. I know it's probably all in the back of my mind.