The art of getting someone else to do something you want done because he wants to do it.
~Dwight D. Eisenhower
Richie Adubato was the master at this. My time with him in New York and Washington taught me so much about dealing with people. It is truly a gift. He was able to adapt to any personality and use his sense of humor, his huge basketball acumen and his genuine niceness to empower even the toughest personalities to do what he needed them to do and think it was their idea.
I think the Leadership 501 site is a great resource for positive ideas on evaluating and building leadership.