Recently re-read "Eat That Frog" by Brian Tracy. It's an incredible book that I highly recommend -- especially to assistant coaches. In one of the sections, Tracy talks about three questions for maximum productivity:
You can use three questions on a regular basis to keep yourself focused on completing your most important tasks on schedule. The first question is, "What are my highest value activities?" Put another way, what are the biggest frogs that you have to eat to make the greatest contribution to your organization? to your family? to your life in general?
The second question you can ask continually is, "What can I and only I do that if done well will make a real difference?" This is something that only you can do. If you don't do it, it won't be done by someone else.
The third question you can ask is, "What is the most valuable use of my time right now?" In other words, "what is the biggest frog of all at this moment.