Include the why

We are likely to take action with a reason, even if it's a weak reason. A study called the The Copy Machine study discovered that people were more likely to let someone skip the line when they proivded a reason ("I'm doing this because...")

It helps your team understand the priority of the item and why it should be done. Ben Horowitz tells a story of when he understood that his authority was not enough but his team needed a why:

The more that I thought about it, the more I realized that while I had told the team “what” to do, I had not been clear about “why” I wanted them to do it. Clearly, my authority alone was not enough to get them to do what I wanted. Given the large number of things that we were trying to accomplish, managers couldn’t get to everything and came up with their own priorities.