By spending time with someone who had already learned those skills, or was in the process of learning, generally a person with a luminous quality of caring. Think of Robert Redford's film character in The Horse Whisperer, watching for the right moment to help a horse and its youthful rider to transcend their limitations. Effective coaching is a relationship of generosity, in which the coach is clearly identified as a fellow learner. But there's more to coaching than companionship. In fact, coaching is most effective when the parties push the envelope, examining what's happening within the relationship itself.
Coaches ask the darnedest questions, and the answers can sometimes turn a career around.
Of course, it takes courage to open oneself to questions of that quality. But the exercise of personal courage is precisely how one develops as a leader. On the other hand, it is natural that such a relationship could make a person intensely nervous. This means a commitment to privacy and confidentiality, along with an unconditional positive regard for the person being coached. Without that margin of security, people won't take those risks which might catapult them into creative and strategic effectiveness.