In an interview with Fortune, Steve Jobs offered an interesting and, typically, upside-down perspective on focus:

steve_jobs_ceo

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 100 other good ideas that there are. You have to pick carefully. I’m actually as proud of the many things we haven’t done as the things we have done.”

I can’t agree more.