In this chapter, we are concerned with ordinary hubris – what social and personality psychologists empirically study under the heading of self-enhancement. This umbrella term refers to both (a) the motive to augment or protect the positivity of the self, and (b) probable manifestations of that motive at a cognitive or behavioural level. We review five such manifestations: the better-than-average effect (regarding oneself as superior to others); the self-serving bias (taking credit for success but disavowing blame for failure); selective memory (forgetting one’s weaknesses but not one’s strengths); overclaiming (endorsing flattering falsehoods about oneself); and socially desirable responding (strategically acting to gain social approval). We also discuss the case of excessive self-enhancement: narcissism. This personality trait combines self-serving grandiosity with manipulative propensity. Narcissists irrationally over-exhibit all five key manifestations of self-enhancement but are likely to be over-represented among movers and shakers. We conclude with a nuanced consideration of self-enhancement’s costs and benefits.