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I made a list of the time I spent on various activities as I mentioned in the post. Then I grouped them into different categories.
Writing is a must (critical). I enjoy reading fiction and listening to audiobooks but I don’t have to do either (preferable). I considered my daily walk critical but it wasn’t critical the same way writing was. It was critical for my soul, so I labeled it sacred.
Then there were those tasks I didn’t want to do but had to do in order to perform my critical tasks — commuting to work as an example.
Everything else was unnecessary.
My first iteration of this exercise didn’t have “sacred” or “preferable.” I grouped all those tasks as “critical” which didn’t make sense, so I added the new categories.