"People think focus means saying yes to the thing you’ve got to focus on. But that’s not what it means at all. It means saying ‘no’ to the hundred other good ideas that there are. You have to pick carefully. I’m actually as proud of the things we haven’t done as the things I have done. Innovation is saying ‘no’ to 1000 things."
Steve Jobs, WWDC 1997
(h/t Aaron Zuchhold)