Given the huge number Xbox owners and how many of them love gaming spectatorship, it's a natural fit to bring the Twitch experience to the 360.

Most startups are not just built for the person who is using them. When you do that, every now and then you get really lucky and... are representative of some huge class of people who all want the same thing you do... but very often that just turns into a side project that doesn't go anywhere.

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

It's one of the most validating things you can do for a product is go out there and get them to commit to pay you up front.

This is true for most new products. The majority of people you're competing with are non-users. They are people who have never used your service before. And what they say is actually the most important. What they say is the thing that blocks you from expanding the size of your market with your features.

If you just talk to who's easy to talk to, you're not really getting the best data.

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

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

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