Well, I'd make them more specific to the task I'm trying to solve. For instance, if I had to write what was the results of some paper and what is it's contribution to my field in 1000 characters or less, I'd make that my writing prompt.
Other than that, if I'm not trying to actually tackle something important I'd probably try to use them in goofy ways, such as writing ones with "are you done yet?" or "memento mori".
Other than that, if I'm not trying to actually tackle something important I'd probably try to use them in goofy ways, such as writing ones with "are you done yet?" or "memento mori".
That, or use them as post-it notes.