So if you want to get things done, you positively have to understand at any given point in time what is the most important thing to get done right now and if you're not doing it, you're not making progress at the fastest possible rate.

Listen to your customers, not your competitors.

A user interface is well-designed when the program behaves exactly how the user thought it would.

There's a subtle reason that programmers always want to throw away the code and start over. The reason is that they think the old code is a mess. [...] The reason that they think the old code is a mess is because of a cardinal, fundamental law of programming: It's harder to read code than to write it.

So if you want to get things done, you positively have to understand at any given point in time what is the most important thing to get done right now and if you're not doing it, you're not making progress at the fastest possible rate.

Indeed one of the best ways to deflect attacks is to make it look like they're succeeding. It's the software equivalent of playing dead.

Watching nonprogrammers trying to run software companies is like watching someone who doesn’t know how to surf trying to surf. Even if he has great advisers standing on the shore telling him what to do, he still falls off the board again and again.