I was surprisingly moved by this interview with Alistair Campbell from the BBC website magazine. I agree with the interviewer that Campbell comes across as one of the most hard-nosed men of certainty, and here he is allowing himself to be seen as vulnerable in acknowledging his self-doubt. In fact Campbell goes further and sees a virtue in his having doubted himself prior to making a decision.
I also watched this fascinating clip of John Cleese on creativity.
He too discusses decision making, but form the point of view of creativity.
Cleese epecially refers to the example of politicians operating under the adrenyline rush of pressure who lose the time to enter what Cleese refers to as the open mode where creative thinking exists.