Design adds value faster than it adds cost.

If something seems possible, that's probably because someone is already doing it. When something seems that it can't possibly work, nobody tries it. Real innovation happens when someone tries anyway, overlooking an obvious flaw, and finds a way to make an idea work.

Not having a schedule is OK if it's your PhD and you plan to spend 14 years on the thing, or if you're a programmer working on the next Duke Nukem and we'll ship when we're good and ready. But for almost any kind of real business, you just have to know how long things are going to take, because developing a product costs money.

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.

Something is usable if it behaves exactly as expected.

Nothing works better than just improving your product.

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