There is a phrase: “juggling precious eggs in variable gravity”. It has generally been ascribed to a character in a story co-written by Larry Niven and Jerry Pournelle, but Googling has so far failed to confirm this. Nevertheless, it is a useful phrase. It reminds me of writing.
There is so much to keep active when writing fiction, especially a longer piece, such a novel. Amongst the various eggs to be juggled are where the story is going, how the characters are developing and describing where they are. If you’re a writer, this should not be news. It’s not easy, either.