Here is a nice article by Travis Bradberry on Fobes that looks at the 12 habits of exceptional leaders.
However, what really struck me about this article were the quotes that Travis used to illustrate each habit.
“Courage is the first virtue that makes all other virtues possible.” —Aristotle
“The more elaborate our means of communication, the less we communicate.” —Joseph Priestley
“A good leader is a person who takes a little more than his share of the blame and a little less than his share of the credit.” —John Maxwell
“Humility is not thinking less of yourself, it’s thinking of yourself less.” – C.S. Lewis
“It is absurd that a man should rule others, who cannot rule himself.” —Latin Proverb
“The way you see people is the way you treat them, and the way you treat them is what they become.” – Jon Wolfgang von Goethe
“If you just work on stuff that you like and are passionate about, you don’t have to have a master plan with how things will play out.” – Mark Zuckerberg
“The very essence of leadership is that you have to have a vision. It’s got to be a vision you articulate clearly and forcefully on every occasion. You can’t blow an uncertain trumpet.” —Reverend Theodore Hesburgh
“Just be who you are and speak from your guts and heart – it’s all a man has.” – Hubert Humphrey
“Management is like holding a dove in your hand. Squeeze too hard and you kill it, not hard enough and it flies away.” – Tommy Lasorda
“The ancient Romans had a tradition: Whenever one of their engineers constructed an arch, as the capstone was hoisted into place, the engineer assumed accountability for his work in the most profound way possible: He stood under the arch.” – Michael Armstrong
“You don’t lead by pointing and telling people some place to go. You lead by going to that place and making a case.” – Ken Kesey