This works great for many families, and Mr. Free and I tried this too when we were first married.
But here was my dilemna. When making plans and getting deadlines I often wasn't at home. So often I would forget to put it on the calendar on the fridge, and then when it was time for us to let's say, bring breakfast to Sunday School...we would forget.
So here's what I do.
I use my cell phone.