Video Summary: So much of our human life is passed at a subconscious level, a level below our awareness. Very little of our activity, especially in our mind, "registers" in the course of our day.
"Mindfulness" is being in the moment while you observe yourself. Its power is in focusing your attention on what's presently taking place within your own body, without judging it. It is incredibly difficult to maintain mindfulness for anything more than a few seconds, without substantial practice. The best way to practice is to start to be mindful of just a few mundane things that happen in your day: when you pass a certain landmark, or every time you perform a common task.
Despite our best intentions, the difficulty in being able to consistently practice mindfulness is a reminder that humans are as much or more animal as they are rational. Many of our actions, and the thoughts we have while performing them, are automatic. Without teasing out the existence -- and then the origin -- of those thoughts, we'll never truly master our emotions and become self-aware. Gaining that control holds the key to true personal development.
Practicing mindful meditation substantially improves awareness and has been used in western psychology to alleviate stress, anxiety, and depression.