The best advice I have ever recieved (and has worked greatly) is to practice shooting at a golf tee stuck in a target. You will begin to aim at a smaller area and your groups will deffinately tighten up. I went from shooting a 3-4" group to a 1" group simply by practicing like this. Most people will aim at the general area of the heart and release (which will give you a good pattern) but the smaller the area you aim for the smaller your pattern will be.