If you're looking for the antonyms for the phrase "more time-wasting," you'll be pleased to know that there are plenty of words that perfectly fit the bill. Firstly, to avoid wasting time, you could focus on being productive, efficient, and goal-oriented. Instead of being idle or lazy, you could strive to be active, busy, or hard-working. Additionally, you could try to be punctual, timely, or prompt, ensuring that you do not waste any more valuable time. Lastly, you could also make the most of each moment and seize every opportunity that comes your way rather than procrastinating or delaying.