I use the creation principle: I work on one project per day just like the Godz did while creating the world.
As a serial parallel entrepreneur, I have thus “xy days” and try to concentrate on one topic*
Monday: Startnext day and backoffice
Friday: as all the work is done, this day is dedicated to networking and ideation
I don’t work on Saturday and Sunday and I’m bored :)
*(basically, theoretically, yeah, that’s the plan)