Every time you make a rule you take away a choice, and choice, with all of its illuminating repercussions, is the fuel for learning.

It remains true that great managers recognize individualities and focus on developing strengths rather than weaknesses. Great leaders, in sharp contrast, recognize what is (or could be) shared in common - a vision, a dream, a mission, whatever - and inspire others to join them in the given enterprise.

My point is, people really don't change very much.

Google and Facebook, each in their own way, have revolutionized the delivery of advertising based on search and social networking, creating a sort of anti-Spam: targeted, relevant ads that a consumer might actually welcome rather than spurn.

If we have to know without a doubt that the choices we are making are the perfect ones, we risk never making any choices at all.

Born of the impossibly varied options we have to amuse ourselves, cutting-edge companies are finding innovative ways to tailor our entertainment choices to who we are, relieving us of the burden of finding the diamond in the rough of 500 TV channels or thousands of movies and music albums released every year.

There's something unique and different that makes a leader, and it's not about creativity or courage or integrity.... A leader's job is to rally people toward a better future.