The reason that to-do list is never completed and that never feel like getting enough done has far less to do with procrastination, than with the chronic habit of overcommitting to work, and then underestimating how long that work will take me.
Once you understood that trying to do too much in too little time was the real problem, that dynamic shifted.
Reframing your time-crunch will allow you to embrace a growth mindset, identify solutions.
All those moments when you're supposed to be writing, but instead get out to seat and weed the garden, or vacuum, or prep for dinner, or stand in front of the refrigerator wondering why there are no good snacks inside
That could be the time when you let your brain unfocus so that creative thought can flourish.
All of these activities activate the default mode network in the brain.
Letting go of guilt made it possible to go looking for solutions.