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 have this idea that you think is awesome. You want to have that broadest group you possibly can. You don't want to just talk to 1 type of person and learn that, you want to get familiar with the space.

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.

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.

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

Sales is this cure all for this problem. Get people to give you their credit card and I guarantee you they're actually interested.

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.