I don't know how things go down in your house, but on nights I don't really feel like cooking, the solution is usually pasta. It's quick, simple, and comforting — all the right qualities for a midweek meal.
I also like to keep dinner from getting boring, so I skip the jarred sauce and top my pasta du jour with something from the pantry. It can be a single ingredient, or a combination of a few staples I have handy, but I always have them on hand so I don't have to run out to the grocery store. I bet that most of these are things you have in your pantry as well, but there might a few that surprise you!