This is a good matrix for time management. I will refer to these principles when I am having difficulty discerning on if tasks are important vs can be scheduled for later.
I way I organize my monthly tasks is through Google calendar. I don’t think I would be able to function without my calendar to tell me my weekly tasks. I think a good thing to do is to know what tasks you do every month. I place them on the same day every month, which reoccur. This eliminates tasks being forgotten and sets a good flow and schedule for the month.