Stews and soups are pretty good in general--although I tend to like reheating stews with big chunks of meat less than something like a chili. I agree on lasagna. I always make one using three bread pans, freeze 2, and eat the third over 2 or 3 days.

I'm annoyed at my local BBQ place. They changed their menu around a couple of months ago and now fries are automatically included as a side which doesn't fit well with bringing the takeout home and eating it in a couple hours.