The goal is to protect your A time from all the B and C tasks that tend to fill it up.
Jensen (2017) suggests rating and breaking up your energy hours as A, B, and C time. A time is dedicated to your writing. The goal is to protect your A time from all the B and C tasks that tend to fill it up. B and C times are for tasks that require alertness and focus, but not necessarily your best creative energy. C tasks are ones that are mostly routine and don’t require as much insight or creativity as writing does. Keep in mind that this is not an evaluation of essential worth. Rather, it’s a way to let different elements of our life and schedule to “feed” our energy levels in different ways.