In my monthly plan, I have a list of things that I need to get done this week. Invariably, there's some stuff, from last week, that I didn't get finished in time. There is always new stuff that's been added to the list, as clients get in touch and let me know about things that need changing.
So the monthly plan (and the three monthly one) is out of date almost as soon as it's written.
That's why I have a weekly plan. This basically does a quick review of last week, so I know what was missed and needs rescheduling. And then draws up a list of things that need to happen this week.
It looks something like this:
Aim for the quarter
Restate the aim for this three months so I don't forget where we're headed
Aim for the month
Restate the aim for this month so I don't forget the goals
Review of last week
Copy over last week's task list, with each item ticked or not, as relevant
Plan for this week
Draw up a to do list for this week - based on what's in the monthly plan, plus whatever was not completed last week
Take action: A week is a really good time period to review what you're doing and take stock. Are you getting left behind? Your weekly performance should let you know.