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

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

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.

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.

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

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

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.