The instant they say something you don't expect or already know, you should drop into detective mode.

That's actually one of the most disappointing things about doing user interviews and user feedback, which is why I think... people don't do it. You're going to get negative news about your favorite pet feature most of the time.

The one question you can't ask is, "Is this feature actually good or not?"

The most common mistakes are showing people your product- don't show them your product, it's sort of like telling them bout a feature.

Twitch launched in June of 2011, and our growth ever since has exceeded even my expectations, which were not small. A year and a half later, the community of broadcasters and viewers has multiplied hundreds of percent.

The pool of people you care about is going to shift over time.

The most interesting things you learn in an interviews come from the: 'interesting', 'tell me more'