Kathy Sierra on the limited pool of mental resources shared by deep thought and willpower:
Spend hours at work on a tricky design problem? You’re more likely to stop at Burger King on the drive home. Hold back from saying what you really think during one of those long-ass, painful meetings? You’ll struggle with the code you write later that day.
This concept will serve to support a common claim of mine: I had to eat all of that Taco Bell, because I was thinking really hard earlier.
Kidding aside, it’s a pretty illuminating idea. Sierra’s essay illuminates the practical implications for those in creative professions, and is well worth a read.