At the end of the day, how many ads did it take to convince you to use Facebook or Twitter? It wasn't marketing or advertising that convinced you to use these services. It was their value.

The Internet is such a tough marketplace because everyone is a click away from going back to a cat photo, or going back to whatever else they were doing. You have to win them over, and do it quickly, and do it by making something people actually want.

If you look now, more than ever new entrants, new upstarts, are able to grow so much faster than they could before.

The reality is, there's still so much we haven't yet figured out. There's still so much stuff that has not been made more, frankly, efficient.

I like sarcasm. I like snark.

Every founder has to delude themselves into thinking, "Yes, it's going to be big. It's going to take over the world."

Hundreds of these companies I've seen since the beginning stages - including Dropbox and Airbnb - one of them has actually been crushed by an incumbent. The Googles, the Twitters, the Facebooks, they might be someone to acquire you, which is not necessarily a bad position to be in.