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 crucial people to get your product started for the first 6 months are not who will be using it 3 years later.

A goal of Twitch is to be wherever gamers are, whether its on laptops and handheld devices or integrated into gaming consoles and software.

The other mistake I think people make is talking to who's available rather than talking to who they need to talk to.

People who are using your product and putting up with all these issues, means that they are not actually the biggest problems.

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

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.