I have a crazy amount of different jobs so the way I manage that is to not do more than one at a time. It's like old computers that had small memory chips they would do something called swapping where they would fill the memory with one task do it and get it out.
Beyond that I seem to be compelled to write science fiction rather than fantasy or mysteries or some other genre more likely to climb onto bestseller lists even though I enjoy reading a wide variety of literature both fiction and nonfiction.