After eight years, it still applies. So in honor of St. Patrick's Day, I am foisting this content on you once again.
One of my mentors always told me about the art of strategic neglect. He took the concept from the book "On Becoming a Servant-Leader."
It's a fancy way to talk about basic time management and effectively managing your work.
Basically your customers are an infinite vessel. You could work 24/7 on their requests and never be "DONE" with your work. As a result, you must practice the art of strategic neglect. Strategic neglect realizes that there is typically more work to be done than there is time and energy to do.
Therefore it becomes just as important to know what to neglect as it is to know what to do. Prioritize your projects, focus on the most important item and neglect those less important items until they become a priority. You will be more effective.