A concept in the health-minded community is that of "spoons."
The original example seems to have involved a person handing a friend spoons and explaining the "cost" of doing various activities when one suffers from chronic health issues.
This example can be extended to people who don't necessarily suffer from more serious conditions but who still find they have limited energy and resources due to other factors- stressful life situations, conditions that aren't necessarily categorized as chronic but still cause a quick depletion of energy, and so on.
This goes back to our needing to set boundaries. We can't be everything to everyone at all times. That's not how life works. Even without the comparison to having to give up spoons, we have to make decisions on what to prioritize.
We also have to extend compassion to ourselves when we can't meet all the tasks we dream of accomplishing. Maybe work takes priority one day; maybe family the next; maybe you can't also work on your novel or art.
If you're like me, you might have a tendency to then attack yourself for not having endless amounts of energy. On the contrary, kindness is crucial in these situations.
It's very rare to find an individual with seemingly endless amounts of energy, though some people make that kind of claim. Good for them! I'm definitely not that kind of person.
Again, how would you treat someone else if you saw them experiencing what you're experiencing? Maybe you're not oriented toward showing yourself kindness, but you would show kindness to another, so why not yourself?
Think about these things.
Also, don't forget what I said before: ask yourself, "What would my Higher Self do?" in this situation.