Having ideas and doing them - that's what entrepreneurship comes down to. That's something that makes you not just a great founder who I want to invest in, but also a great employee or someone I want to work with.

You can throw - and we've seen plenty of these kinds of companies - millions of dollars in advertising for a website or a service, and in the end if it's not useful no one's going to use it.

We were very, very lucky being in the first round of Y Combinator because that alone generated a lot of interest. A lot of readers of Paul Graham were just excited to see what was going to come up. And we were the first ones to launch.

I can't begrudge anyone who opts to get a job instead of creating one for themselves.

It takes discipline not to let social media steal your time.

Being effective at social media, whether for business or personal use, means capturing people who have short attention spans. They're only a click away from a picture of a funny cat, so you have to make your thing more compelling than that cat. And that can be a high bar.

Obviously solving the education problem is big and complex, and there's already so many failings, but coding is the new fluency. This is the most valuable skill of this century. If you want to be a founder of a company, and not even just a tech company, but like a founder of a company, because I'm telling you software is going to play a role.