The most important part of a training session (or practice) is the 5 minutes prior up to 5 minutes after the start. That 10-minute window is vital for coaches to adjust on the fly their intensity and overall plan for that day. No plan should be ever set in stone. The same goes for training (or practice) plans. It is important to remember that you are dealing with human beings. We are dealing with kids. During this 10 minute window, this is where you ask questions, observe your athletes and complete an overall review of your plan for that hour (or day.)