Pick three key attributes or features, get those things very, very right, and then forget about everything else… By focusing on only a few core features in the first version, you are forced to find the true essence and value of the product.

Google is about information and computers and making things really fast. Facebook is about the sharing and connections. These missions give these companies direction and motivation.

If everything you do works, then you're not taking many risks and probably aren't innovating either.

Email is not going to disappear. Possibly ever. Until the robots kill us all.

Many people with jobs have a fantasy about all the amazing things they would do if they didn't need to work. In reality, if they had the drive and commitment to do actually do those things, they wouldn't let a job get in the way.

Start out by making 100 users really happy, rather than a lot more users only a little happy.

I like writing code. I like building product. I like making things that people like.