I pretty much do what Margie does, except that I plan my meals paycheck to paycheck because I do a big bulk shopping trip once a month. I usually end up making extra of foods so it lasts for 2 or 3 days or I can freeze it if I want, and I try to plan crockpot meals for the days I know I won't have time to make dinner. It has actually helped a lot with me not feeling so pressured for dinner when I am exhausted and it has saved us some money not buying food we didn't end up using.
Also, if you worry about the kinds of food everyone else in your family likes, I have been letting hubby and the kids give me lists, or just tell me when they think of it, of dinners they would like and try to incorporate one or two into each week. I will also try to add one or two new recipes no one has tried before just to shake things up a bit. The family seems to like that when they ask what is for dinner they can either look at our menu plan or ask and I actually have an answer.