Sustained success means making the greatest possible impact over the longest period of time

It's a special person - and personality - who can lead a start-up to soaring success and sustain that success for the long term. Apple co-founder Steve Jobs and Facebook's Mark Zuckerberg are star examples.

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.

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.

There is no shortage of mechanisms by which to measure almost anything.

We all want the chance to express the very best of ourselves and to be challenged to keep reaching for more. Our time at work affords us this chance - not the only chance, to be sure, but, given that we're there forty or fifty hours a week, it's one of the best.

The difference between a pebble and a mountain lies in whom you ask to move it.