Charge for something and make more than you spend.

Attention to detail can't be (and never is) added later. It's an entire development philosophy, methodology, and culture.

Microsoft loves losing money with online services, so this should stay free forever... unless they get a new CEO who isn't crazy about pouring billions into a hole.

Apple already had everyone's billing information from iTunes... you could buy things just by typing in your password... That, for the first time, brought very, very easy payment to the modern software world. That, more than anything, is why there is a business for paid apps.

One reason I love the Kindle, more so than the iPad, is that on the Kindle you can't do anything else but read. It's the best, because it does the least. It doesn't even show a clock.

With a Web and iPhone app, I try to find new and tiny ways to delight my customers. They may not notice, but it helps drive goodwill and makes your product remarkable.

I don't need every customer. I'm primarily in the business of selling a product for money. How much effort do I really want to devote to satisfying people who are unable or extremely unlikely to pay for anything?