I try to optimize my day as much as I can. I don’t like to waste time. I know “time” is the most valuable asset.
If I don’t work, I read. If I don’t read, I listen to podcasts. If I don’t listen to podcasts, I write/think. If I don’t write/think, I go to the gym or for a walk…
But it’s ok to have a down day sometimes, not want to do anything. So those “unproductive” days are fine. This journey is a marathon, not a sprint.