If it meant I was just gone from their lives for 10 hours at a stretch, I wasn't interested. I wouldn't take a job like that.

There are so many other things for us to talk about that it just hasn't come up. We'll say 'How's it going?' and that's about it. By the end of the day, we've usually seen each other's work, anyway.

It's hilarious to watch tapes of ourselves from back then. We were very green -- but very enthusiastic.

There may be a perception that, with franchises, they're all the same, so that limits the ability to experiment. But that's not true. We've always kept two slots open on the menu of each Subway franchise - slots that franchisees can use to come up with their own sandwich ideas.

Profit or perish... There are only two ways to make money: increase sales and decrease costs.

Six months after we started, in 1964, there was a day when we sold only seven sandwiches. If we'd taken all the money from the register, we couldn't have paid an employee, much less the food or the rent or all that. It could have been a turning point. We could have given up.