In poor countries, we still need better ways to measure the effectiveness of the many government workers providing health services. They are the crucial link bringing tools such as vaccines and education to the people who need them most. How well trained are they? Are they showing up to work?

Giving money effectively is almost as hard as earning it in the first place.

The early personal computers were not very powerful so the idea of feeding their program into a small amount of memory requires immense skill.

I can understand wanting to have millions of dollars; there's a certain freedom, meaningful freedom, that comes with that.

There's no such thing as going to a soapbox and saying, 'The government's corrupt,' and not having the intelligence service see your face. In the digital world, that can be done.

Learn from your unhappy customers.

I understand how every healthy child, every new road, puts a country on a better path, but instability and war will arise from time to time, and I'm not an expert on how you get out of those things.