Dan Ariely: Emotional influences - http://www.wired.co.uk/wired-m...
"When we confront a situation, our mind looks for a precedent among past actions without regard to whether a decision was made in emotional or unemotional circumstances. Which means we end up repeating our mistakes, even after we've cooled off. I said that Eduardo and I wondered if past emotions influence future actions but, really, we worried about it. If we were right, and recklessly poor emotional decisions guide later "rational" moments, well then we're not terribly sophisticated decision-makers, are we?" - Fred Yankowski