Choose something you are passionate about - or a pain point that has affected you and that you feel really needs to be changed.

Starting a company, your success is going to be very dependent on how you adapt. You're going to make decisions, you're going to make bets; most of them are going to turn out to be wrong.

On mobile, what are the core apps? It's basically messaging, mapping and review data.

The entrepreneurs that really make it are the ones that start with an idea but are ready to change it at a moment's notice.

You have to be very nimble and very open minded. Your success is going to be very dependent on how your adapt.

Everyone is panicked about the transition to mobile. I don't lose any sleep whatsoever.

Yelp is in a very nice spot: local data, and especially review data, is one of the killer apps on mobile phones.

I think with every successful consumer Internet business, there will be lawyers that are interested in going after your company, especially when they think that there's a financial incentive.

Consumers are empowered by Yelp and tools like it: before, when they had a bad experience, they didn't have much recourse. They could fume, but often nothing else other than tell their friends.

Maintaining the trust of the consumer is critical to our business

In the very beginning, Yelp started as a service where we really didn't think people would write reviews for fun. The whole concept of user-generated content was pretty nascent in 2004.

Earth girls aren’t easy.

By 2029, computers will have emotional intelligence and be convincing as people.

Stupidity has a knack of getting its way.

In your life there are a few places, or maybe only the one place, where something happened, and then there are all the other places.

Only a complete moral idiot can believe for an instant that we are fighting against the wretched of the earth. We are fighting, as I said before, against the scum of the earth

When the right moment appears, the key is to not let it pass.

Amy Pond is, er...I've sort of fallen in love with Amy Pond.

Affiliate marketing has made businesses millions and ordinary people millionaires.

The red-carpet thing of premieres and parties is probably my least favourite part of my job.