Jen at Conversion Diary puts one up every week:
Like a lot of moms of chaotic households, I plan out our dinners for each week so that I can stay on top of shopping and cooking. Back in 2005, I created a simple, clean little template menu in a Word document, and each Sunday I type in the week's meals, print it out, and slip the paper into an acrylic display holder on our fridge (the holders are available cheap at any office supply store). My family loves to be able to anticipate what we're having each night, it makes a good conversation piece when friends are over, and it's handy for me to have the menu in a place where I can see it easily. Most importantly, it only adds about two minutes of work to type the meals into the template and print it — a big value add for such a little expenditure of time.