Mindfulness, a mix of self-awareness and emotional intelligence with subtle differences. Being mindful has empathy, compassion, focus and presence. The phrase "To live in another's shoes", as well as your own is all about being mindful. Mindfulness is about living in the present and just knowing one exists, focusing on what is now. Focusing on what is happening right now and putting everything else to the side.
Further reading, updated regularly.
A list of published papers/articles on self-awareness.
A list of published books on self-awareness.
A list of websites on self-awareness.