I believe the left check list is stuff no related to the task but stuff to “prepare” for starting the task. For example writing a book, before writing I should change the os on my computer and should read this paper on lexography and watch this video series on character growth arcs and I should buy a cat as good authors tend to have cats, well now I need to buy a cat food bowl and a water dish, I need to learn to use this software to track my writing, oh that can interpret my latex script, what’s latex…several years later…oh the book yeah I’ll start it right after I clean the cats litter box…