Menu Planning Ideas

I always try to plan our weekly menu but every now and then I fall off the wagon. When that happens, sometimes I feel stuck about what to cook and I always turn the same recipes. Tries and tested of course but it does get boring after a while. A friend recently suggested planning monthly menus rather than weekly ones. But then she admitted it took her 3 weeks to prepare a monthly menu :) I always try to plan the menus while kids are sleeping. I get my books from the shelves, to try new recipes, but oh I get so hungry reading about all that lovely food and need to fix a quick panini or hot chocolate  for my good self :)
So I searched the Pinterest and came across some rather useful ideas.
Menu Planning by DaniBP
Free Printables from The Nest Effect
Monthly menu planning tips by Passionate Homemaking
The Clay Family's Kitchen Command Center
Menu Planning made simple by Mom Writes
Magnetic Menu Planning Calender by Controlling My Chaos
100 Days of Real Food's menu plans
Do you plan your menus? Have you found a system working for you? I would love to hear from you.