Start a Casserole Club. One night a week, you make two casseroles for dinner, and bring one to a friend. And one night a week, you don't have to make dinner, because a friend will be bringing a casserole to you. It's so simple and brilliant (if I do say so myself). My Casserole Club makes sure that my family gets at least two proper dinners every week: One that someone else cooked for us, and one that I had to cook because I was cooking for someone else (which somehow is a much more effective motivator than just cooking for my family).
For full Casserole Club details, see my other blog.