You have to use your judgment. In cases like that, we say, 'let's be simple minded. We know this is a feature that's good for customers. Let's do it.

If you invent frequently and are willing to fail, then you never get to that point where you really need to bet the whole company.

If you never want to be criticized, for goodness sake don't do anything new.

Our biggest cost is not power, or servers, or people. It's lack of utilization. It dominates all other costs.

You don't want to negotiate the price of simple things you buy every day.

I don't want to use my creative energy on somebody else's user interface.

It’s very important for entrepreneurs to be realistic. So if you believe on that first day while you’re writing the business plan that there’s a 70 percent chance that the whole thing will fail, then that kind of relieves the pressure of self-doubt.