The problem is that this limits your ability to think in an objective manner. The key to rational thinking and clear decision-making is to remain flexible. So the next time you hear yourself saying “I must!’ step back and ask yourself, “Must I?” Ask yourself if the sabbatical you’ve been fantasizing about taking realy makes more sense after the kids get out of college; consider whether a dependable car might make more sense than that Porsche 911 you saw in the used-car lot. You might be surprised how good it feels to make the more logical (read: grown-up) choice.