waste of time Antonyms

good moments bigtime deal best time time tracking time scheduling time analysis time administration task management good time management arrangement of working time prioritization of tasks management of time dear life dear time beneficial process good memories fruitful undertaking fruitful affair fruitful activity favorable offer fascinating pastime worthwhile task useful activity precious time great moments wonderful time effective planning best moment of one's life prolificacy productivity production output labor fertility fecundity effort efficiency effectiveness capability richness studying timing best moment beautiful time advantageous offer time management time control quality time productiveness on it