There are exactly two things which contribute more to the development of skill and human performance than anything else. These two things are practice and feedback. Without one, the other is ineffective and in some cases can be completely useless. And, it is important to note that not all types of practices and not all sources or methods of delivering feedback are equally effective. My talk today was designed to provide you with the most relevant, up-to-date understanding of how you can apply the most established principles of feedback and practice design to maximize the development of the athletes you coach.