Self-awareness is the ability to understand one's own emotions, strengths, weaknesses, values and motivations. It is the foundation of emotional intelligence and allows people to make decisions that align with their values. The self-aware are honest with themselves and others. They know how their feelings impact their work and relationships. A self-aware person can admit when tight deadlines frustrate them and plan accordingly. The self-aware also understand their capabilities. They play to their strengths and know when to ask for help. Self-awareness shows itself as candor, self-confidence and a self-deprecating sense of humor. Self-aware people can speak openly about their limitations and strengths. They welcome constructive feedback to improve. Unfortunately, some executives mistake candor for weakness. In truth, leaders must know themselves to assess capabilities honestly. Self-awareness enables realistic judgment calls. It is a valuable skill, though underappreciated. With persistence and practice, we can all strengthen our self-awareness.