When one on one with the goalkeeper, perform a finesse shot. This will trick the keeper from going from one side to the other. For example, fake right and shoot left or vice versa. It will go in about 90% of the time.

If you have the ball and are outside the area but not on your half, you can check on the map how far the keeper is off his line. Normally he is about two meters. You can lob him easily if you get the power correct.