Paul Graham has a famous essay about managers vs makers. There are two ways to run your life, he says. Managers know that their day is divided up in pieces for meetings, calls, and administrative tasks. Makers, on the other hand, need to have large blocks of uninterrupted, unscheduled time to do what they do. To create and think.
When people ask how I manage to get so much writing done, my anorexia is the answer. Same goes for how I’ve managed to keep a healthy relationship and how I manage to exercise and read. I keep a maker’s schedule because I believe that anything else is anathema to deep work or creativity.