Principle of materiality. Don't fret over the inconsequential. Don't sweat the small stuff. The past is a sunk cost. Invest time and resources wisely.
Time is the scarce resource.
Do not confuse thought with action. There is no such thing as a free lunch. Beware of armchair data. When management treats time, space and no-matter as resources rather than as roadblocks, our methods of organization will no longer be lagging behind, at the end. How to behave Live as if this is all there is.