What is in this image is the way I've been meal planning the past few weeks -- and is currently working out quite nicely for us.
on the post it notes are dinners that we ALL like -- and since they are on post its, I can move them around -- so the reason there are some blank spots from a few weeks ago, is that I've re-used the same post it in a different week!
chances are that your family eats essentially the same food, on rotation --- so if you know you like to have something a few times a month, GO FOR IT.
there are no hard and fast rules --- do what fits you and your family's needs.
I always think of Back to School time as sort of the "mom new year." :-)