There is so much to do, and we only have so much energy or time. If you try to do it all, then you become discouraged and exhausted by it all. Recognize what can wait, and focus your efforts on high value tasks.
Remember you are not a machine, and it becomes impossible to do it all. It is not only impossible, but it drains you of the energy needed to do the truly important things.
Namaste
Joseph Sacco - The Stoic Buddhist 
“… in due proportion to its worth”…
To measure the worth, how on Earth?
Of answers there, I have a dearth.
(And idea none why I write in verth)