He tells GQ Magazine, I see it on Lifehacker, I want you to know it too:
“These situations where I can’t make a choice because I’m too busy trying to envision the perfect one—that false perfectionism traps you in this painful ambivalence: If I do this, then that other thing I could have done becomes attractive. But if I go and choose the other one, the same thing happens again. It’s part of our consumer culture. People do this trying to get a DVD player or a service provider, but it also bleeds into big decisions. So my rule is that if you have someone or something that gets 70 percent approval, you just do it. ‘Cause here’s what happens. The fact that other options go away immediately brings your choice to 80. Because the pain of deciding is over.
“And,” he continues, “when you get to 80 percent, you work. You apply your knowledge, and that gets you to 85 percent! And the thing itself, especially if it’s a human being, will always reveal itself—100 percent of the time!—to be more than you thought. And that will get you to 90 percent. After that, you’re stuck at 90, but who the fuck do you think you are, a god? You got to 90 percent? It’s incredible!”
That actually comes from page three of the interview: it’s all a good read so do start right at the top here.