The term "time-wastings" refers to those activities that consume our time, without much productive use. Therefore, the antonyms for this word must be those activities that are beneficial and useful in making the most of our time. Antonyms for time-wastings would include productive, profitable, useful or purposeful pursuits. Activities such as exercising, working on a project, reading, learning a new skill, meditating or spending time with loved ones, are examples of productive ways to spend time. Engaging in these activities not only helps in personal growth but also ensures that time is used wisely, leading to a more fulfilling life.