Although doing great work takes less discipline than people think — because the way to do great work is to find something you like so much that you don't have to force yourself to do it — finding work you love does usually require discipline. Some people are lucky enough to know what they want to do when they're 12, and just glide along as if they... See more

As a lower bound, you have to like your work more than any unproductive pleasure. You have to like what you do enough that the concept of "spare time" seems mistaken. Which is not to say you have to spend all your time working. You can only work so much before you get tired and start to screw up. Then you want to do something else—even something... See more