I write very little shippable code in first day of a 3 day task. Also my itch for unfinished work is very unhealthy. Does 20% favour guys who compartmentalize u

I write very little shippable code in first day of a 3 day task. Also my itch for unfinished work is very unhealthy. Does 20% favour guys who compartmentalize unfinished business to a fixed day every week and ramp up quickly?