“An analogy I use is, if you’re going out for dinner, it’s going to take you a couple of hours. You spend 5 minutes working out where to go for dinner. It seems reasonable to spend 5% of your time on how to spend the remaining 95%. If you did that with your career, that would be 4,000 hours, or 2 working years. And actually, I think that’s a pretty legitimate thing to do—spending that length of time trying to work out how should you be spending the rest of your life.”