Even if you have constrained resources, don't cut corners. People will feel it.

We built the iPod in weeks. It had to be what I thought it was going to be because there wasnt time for endless refinements.

I'm always doubtful. Everything I do is always doubtful. When you're trying to differentiate, there's going to be this gut sense, is this right? If you're not having doubt, then you're not pushing it hard enough, or you're not looking at the details close enough. You need to be feeling that doubt every single day.

Learn by doing. Learn through experiences. And this goes back to Steve Jobs' thing - which is the way you open up your knowledge of the world is by discovering it and learning about it, not through books, but by being there.

Google has the business resources, global scale and platform reach to accelerate Nest growth across hardware, software and services for the home globally.

People buy products, and they want to understand what those things are and how they are applicable to their life.

If you're not having doubt, you're not pushing the boundaries far enough.