Perhaps not always closely associated with Project Management, Tennis should never be far from your mind. It works like this. When a customer is waiting for something from you the ball is on your side of the net.
This is bad but not disastrous. You don’t necessarily have to give them what they want to get the ball back over the net. By simply seeking clarification or asking them a question you can easily get the ball back on the other side of the net. This is good. The heat is now off and you can concentrate on the bigger issues. Practice batting the ball back as often as you can and you will quickly learn how this strategy gives you a more relaxed transition towards the grave.
If tennis isn’t your thing, think of the little clocks they use in chess. You’re job is to keep the customer’s clock ticking. Take great glee when you slam the switch on your little clock down.