The tenth social network, and limited only to college students with no money, also terrible. Myspace had won.

The most common post YC failure case for the companies we fund, is they're incredibly focussed during YC on their company... and after they start doing a lot of other things. They advise companies, they go to conferences, whatever.

The thing that kills startups at some level, is the founders giving up.

The idea should come first, the startup should come second.

A board member of mine used to say sales fix everything in a startup, and that is really true.

AirBnB spent 5 months interviewing their first employee, before they hired someone and in their first year, they only hired 2 people.

Most investors are obsessed with the market size today and they don't think about how the market is going to evolve.