It is done under tension, however, when man does not rise above it but is possessed, controlled and impelled by it. . . . Tension makes work a drudgery, a mad race, an affliction, not only for the worker but also for the those around. He may and should work, but if he does so in a feverish state of tension everything goes wrong, he throws everything into confusion and he thus upsets himself and everyone else. Work is time well spent when the work you do is the work God calls you to do, the work God prepares for you to do. And I'm not just talking about religious workers, but everyone who works.
Rest is also time well spent.
By rest I include sleep, but I also mean lounging in front of the TV or absorbed in a good book. Enjoying time with your spouse, your children, your friends. Playing is time well spent, but adults don't spend enough time playing. Take up a new hobby. Listen to music.