Everyone knows about Black Friday and Cyber Monday. Now help me spread the word about Giving Tuesday!

Expectations are a form of first-class truth: If people believe it, it's true.

Whatever they announce, they announce. They're in their honeymoon period, and anything they announce gets hype ... They will obviously branch out beyond Internet search, but I think the expectations won't live up to reality.

Cutting through complexity to find a solution runs through four predictable stages: determine a goal, find the highest-leverage approach, discover the ideal technology for that approach, and in the meantime, make the smartest application of the technology that you already have - whether it's something sophisticated, like a drug, or something simpler, like a bednet.

Energy is actually harder; it takes more time to get a product, but if you do it's a very, very big market and the constraints of doing that in a clean way are more obvious all the time.

In 80% of the world, energy will be bought where it is economic. You have to help the rest of the world get energy at a reasonable price.

To be a good professional engineer, always start to study late for exams because it teaches you how to manage time and tackle emergencies.