Long-term vision and product strategy.

Climate change is a terrible problem, and it absolutely needs to be solved. It deserves to be a huge priority.

You have the refugee crisis triggered by Syria. That's got a lot of costs associated with it. Domestically, budgets are incredibly tight because the economy's not generating the growth that makes for easy trade-offs.

You’ve got to give great tools to small teams. Pick good people, use small teams and give them great tools so that they are very productive in terms of what they are doing.

Like any well designed software product, Windows is designed, developed and tested as an integrated whole.

Sometimes, I think my most important job as a CEO is to listen for bad news. If you don't act on it, your people will eventually stop bringing bad news to your attention and that is the beginning of the end.

Success is a lousy teacher. It makes you think you know what you're doing.