What are five totally distinct, creative ways to describe the usefulness of empty time?
1. "Empty time is like an open window, allowing the possibilities of the future to unfold." 
2. "Empty time is like a blank canvas, ready to be filled with new ideas and opportunities." 
3. "Empty time is like a fresh start, allowing us to make the most of the present moment." 
4. "Empty time is like a blank page, waiting to be written upon." 
5. "Empty time is like a vacuum, opening up a space for new ideas to come in."