You want to learn about what's already in their heads. You want to avoid putting things there.

The Twitch community loves watching video games, chatting, and broadcasting. The average viewer watches over an hour and a half of video each day. Over two-thirds of our logged-in users chat each day.

I wish I could tell you the recipe for figuring out who the target user is for your product and who your users should be, but... there isn't a recipe. It comes down to think really hard and use your judgement to figure out who you're really building this for.

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

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.

Recording interviews is like magic. a) It stops you from taking notes in the middle and b) you can play that recording for people.

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.