Make every decision—even decisions about whether to expand the business, raise money, or promote someone—according to what's best for your customers.

Learning. It's really the primary reason behind everything I do. Programming, entrepreneuring, writing.

If I’m not saying ‘Hell Yeah!’ to something, then I say no.

The single most important thing is to make people happy. If you are making people happy, as a side effect, they will be happy to open up their wallets and pay you.

When you make a company, you make a utopia. It's where you design your perfect world.

The most important lesson is probably to spend less than you earn.

Care about your customers more than about yourself, and you'll do well.