Peter Drucker on priorities

Develop your priorities and don’t have more than two. I don’t know anybody who can do three things at the same time and do them well. Do one task at a time or two tasks at a time. That’s it. OK, two works better for most. Most people need the change of pace. But, when you are finished with two jobs or reach the point where it’s futile, make the list again. Don’t go back to priority three. At that point, it’s obsolete. – Peter Drucker

Reminds me of Merlin Mann’s “true priorities”:

You eventually learn that true priorities are like arms; if you think you have more than a couple, you’re either lying or crazy.

Recognize the one or two things you really need to do each day, and don’t look back.