Dick Costolo

When you're doing what you love to do, you become resilient. You create a habit of taking chances on yourself. If you do what's expected of you, and things go poorly, you will look to external sources for what to do next, because that will be your habit. You will be standing there frozen. If you are just filling a role, you will be blindsided.

One of the great things about Silicon Valley is, irrespective of how competitive you might be with another company or how closely you might be working with that company, there's a great sort of give and take, and camaraderie from - between - some of the executives in the valley and some of the other investors in the valley.

Set your sights high, the higher the better. Expect the most wonderful things to happen, not in the future but right now. Realize that nothing is too good. Allow absolutely nothing to hamper you or hold you up in any way.