If you are exhausted at the end of the day (every day), but you aren't getting what you need out of life, then you might need to reconsider your to do list.
We share the story about how a lion can hunt mice all day and basically starve over time (not enough calories in vs calories out) OR the same lion can hunt the bigger game that will sustain the pride (group of lions).
We talk about inputs, outputs of time, energy, and value.
Obviously, evaluating your inputs correctly can take a lot of experience, but it is essential that we apply the Pareto (80/20) principle to all areas of our life. Otherwise that part of life will be chasing mice and starving over time.