I think that the "feelings of being or not being productive" are often fairly disconnected from the actual levels of productivity. I do agree that productivity

I think that the "feelings of being or not being productive" are often fairly disconnected from the actual levels of productivity. I do agree that productivity itself exhibits complex patterns, especially with relation to time. These patterns can vary significantly from person to person and over time, though. I've had inklings of some of own trends for some time now, but it's still pretty fuzzy. I expect to slowly learn more through patient, dispassionate self-observation over the coming years and decades, to the best of my ability. It's tricky stuff, but very interesting.