If you look at companies with upside potential, Twitter's right there. They've established a brand in a world where it's extremely difficult to establish a brand. It's a global brand, people recognize it, people want to let you know what their Twitter handles are, etc.

I loved every minute of my time at Microsoft, but I had always envisioned having another phase of life just because I thought that would be interesting. It had never been my plan to work until I literally didn't want to do anything and then hang it up.

I've got my kids brainwashed: You don't use Google, and you don't use an iPod.

I want to make sure (a user) can't get through ... an online experience without hitting a Microsoft ad.

We've grown from 18% of the profits of the top 25 companies in our industry to 23% of the profits of the top 25 companies in our industry over the last five years. Profits are up over 70%, where the industry profit is up about 35%. Pretty good.

The way I do things I usually always prefer to have a very clear strategy and be very focused. At the same time to be very rock solid, and crisp in execution.

It's hard to invent a new thing, and it's just as hard to invent another new thing.