Markets come and go. Good business don't.

Many artists stick to making and hire a manager to focus on their business. Artists that build websites and mobile apps can do that, too.

You simply can't be tentative in a startup. You have to go for it at every chance you get. And if the leader of the organization is anxious, his or her fear pervades the organization. Everything comes from the top in a company. So if you are starting a company or building one, face your fears and move past them. It's critically important to your company.

I believe Android will be stronger in the developing world than it is in the developed world.

If you want to create something great and do it faster than the competition, you need to be action oriented.

My venture investing career has three phases, all roughly 6-8 years long. The first, at Euclid, was software to Internet. The second, at Flatiron, was Internet to bubble. And the third, at USV, has been web 2 to mobile. I have always used a new firm to denote a new investment phase for me. Throw away the old. Start with the new.

Marketing is for companies who have sucky products.