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

... for the top twenty most valuable YC companies, all of them have at least two founders.

We hear again and again from founders, that they wish they had waited to start a startup until they came up with an idea they really loved.

One of the keys to focus, and why I said cofounders that aren't friends really struggle, is that you can't be focused without good communication.

What being a founder means, is signing up for this years long grind on execution - and you can't outsource this.

One of the pieces of advice that we give at YC is: try to work together on a project rather than just doing an interview.

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.