Hours worked isn’t a badge of honor; the achieved results are. Working long past the point of optimal productivity doesn’t speed up the progress. Time spent at rest isn’t "wasted". Low-value tasks must be automated. Meetings with no agenda or issues to resolve turn into ineffective use of everyone’s time.
These productivity principles are nothing new, yet going over them from time to time helps revise working strategies, and rediscover the best use of your time.