Life can get pretty hectic pretty fast especially with things outside of our control. But with things within our control, we can optimize our time to function best. We don't have to write down all the nitty gritty stuff we have to do daily because that filled up calendar or planner will just give us anxiety. What works for me the most is time blocking.
When I was a teacher much like any employee, you get into a routine that you can automate yourself to be productive. A timetable is standard but can be restrictive so sometimes I need a print out within the plastic cover of my clipboard that I edit with an erasable marker. I did this too during college with highlighters for specific subjects / tasks.
It's also great to Plan out your week ahead. Reserving specific days for general tasks such as Monday - Administrative Tasks, Tuesday - Planning & Meetings, and Wednesday to Friday for Research, Drafting and Content Creation.