What not to do

From Managing Product Development:

What’s on Your Not-to-do List?

There is always more work you could do. And there will never be enough time to do it all. The key to successful work is to pick and choose which work to do and when.
When you're planning your work, ask yourself these questions:

1. What does the organization pay me to do?
2. What work helps me fulfill that mission?
3. What work is important to the organization, but should not be done by me?
4. What work is not needed by the organization?