The other interesting point in the article is the five universal sources of leadership development across cultures: (1) bosses and superiors, (2) turnarounds, (3) increases in job scope, (4) horizontal moves, and (5) new initiatives. Which have been important in your career? Which can you provide to your subordinates?
In my own career I learned most from increases in job scope and horizontal moves. But when I was fortunate enough to have a good boss, I learned most quickly from my boss.