Nora Ephron

You do get to a certain point in life where you have to realistically, I think, understand that the days are getting shorter, and you can't put things off thinking you'll get to them someday. If you really want to do them, you better do them. There are simply too many people getting sick, and sooner or later you will.

The historical novelist has to consider what has actually happened, while the SF writer is dealing in possibilities, but they are both in the business of imagining a world unlike our own and yet connected to it.

Frankly, as much as I love to improvise, it hasn't been difficult to stick to the script on 'Mad Men.' The writing is so precise, and the story so carefully crafted, that I don't think there's room - or need - for ad libbing. I could never come up with dialogue as lovely as these writers do, anyway.