Experimental evidence from behavioral economics, psychology and neuroscience suggests that humans are not entirely rational beings. Emotions, culture, media and social norms shape our expectations, perceptions and decision-making. Cognitive biases, or tendencies to think in certain ways, affect the way we process information and lead to systematic deviations from a standard of rationality or good judgment. The impact of these biases can be predicted. Incentives and nudges’ can be used to motivate ourselves, our friends, workers, managers and investors. This interdisciplinary course is relevant to students with interests in economics, psychology and business.