I have this massive notebook called IDEAS and another one called PERSONAL IDEAS and another one called CRAZY IDEAS.

If we compare the two, Facebook is currently a superior place to market a product like Slide. Twitter is more like a general distribution agent. It's like broadcast radio.

You can have successful teams where people hate but deeply respect each other; the opposite (love but not respect among team members) is a recipe for disaster.

You can't get married to any one particular plan. That is the biggest lesson I learned at PayPal.

If I see what you're up to on Facebook but I don't see your updates on Flickr, I'll still care about Facebook.

If you can work a brand successfully into the narrative of your product, then it's really cool. Then people actually take the brand up and say, 'My positive experience in your product is directly connected and influenced by this brand and that worked great.

Being an entrepreneur is not about being in love with an idea, it's about being in love with running a company.