An idea isn't worth that much. It's the execution of the idea that has value. If you can't convince one other person that this is something to devote your life to, then it's not worth it.

Beware of Methodologies. They are a great way to bring everyone up to a dismal, but passable, level of performance, but at the same time, they are aggravating to more talented people who chafe at the restrictions that are placed on them.

Common programmer thought pattern: there are only three numbers: 0, 1, and n.

Shipping is a feature. A really important feature. Your product must have it.

People ridiculously overvalue aesthetics and beauty when evaluating products. It's one of the reasons iPods, and, for that matter, Keanu Reeves, are so successful.

Talk to your customers. Find out what they need. Don't pay any attention to the competition. They're not relevant to you.

Design adds value faster than it adds cost.