Writers on how they spend their days: https://veschwab.wordpress.com/2015/09/16/18-authors-share-a-day-in-the-life/ A few commenters add their own routines (one invites his friend Neurotic Anxiety for overnights).
Follow-up post, editors on how they spend their days: https://veschwab.wordpress.com/2015/09/25/9-editors-share-their-day-in-the-life/
These are writers and editors of fiction, not academic writers, but some have day jobs or mention getting writing done before teaching starts. Besides, I like to think that what I write is creative, though in a different way from fiction, and ultimately writing is writing, IMO. I notice that the editors seem to have even more meetings than Sir John does.
This morning I got to correct some proofs. I love correcting proofs because it is a task that will stay done, unlike writing where you have to keep coming back to it every day to add some more, or revisiting a piece that is supposed to be finished because someone kindly mentioned that it would be better if you added this and this, reorganized that, and cut the other thing. Improving a piece is good. But being DONE for good and all is great.