The bus ride nobody would film can be the only twenty quiet minutes you get all day. Use them.

Dead time is usually the only unscheduled time a day contains. Nothing is expected of you in it, nobody can reach you in a way that demands anything, and that combination is rarer than it sounds once a week gets busy. Filling it automatically is how the last unclaimed part of a day disappears.

Leave one regular stretch of transit unfilled this week and see what your mind does with it. Look out the window, think about a problem properly, or think about nothing. Twenty minutes with no input is not empty; it is where most of your own ideas live.