The design is done when the problem goes away.

[Facebook and Twitter] aren't the real problems in the office. The real problems are what I like to call the M&Ms, the Managers and the Meetings.

Customers don't just buy a product - they switch from something else. And customers don't just leave a product - they switch to something else

We also get thousands of suggestions. The default answer is always no.

The design is done when the problem goes away.

Before you dismiss a beginner's work, remember how much you sucked when you started. You probably sucked worse, actually.

What you do is what matters, not what you think or say or plan.