Coaching begins with increasing your clarity of understanding about self-awareness. Knowing yourself, your preferences and how you relate to the other people in your life is fundamental to the coaching process.
Steven Covey's book The Seven Habits of Highly Effective People identifies Habits 1-3 being directed at self-management. Covey asserts that its not possible to manage others effectively until you can manage yourself.
International management expert Peter Drucker has written a seminal article in the Harvard Business Review called Managing Oneself. Read Drucker's article 197 KB