We used simple cardboard cutouts to mark the days of the week, but you can play around with different materials. Glue each day to the side of your cabinet together with a fork. Not into glueing directly on your cabinet? This works just as well on a cork- or chalkboard.
Keep a collection of your favorite meals on recipe cards nearby. (Bonus if you have the ingredients & recipe on the back). On Sunday nights, just randomly pick enough for the week, and post! This also serves as a menu for everyone to refer to throughout the week.