If a recent research study by the University of New South Wales is anything to go by, it may not take any education to teach us to think carefully and make better decisions. All it takes is to get into a bad mood.
According to the study, people who were put in a bad mood in an experimental setting were not only able to make better judgement but also to communicate it. And it is because of the way the brain "promotes information processing stratgies" when a person is in that emotional state.
So next time you want to make a better decision, try being grumpy.