4. Make dishes that both need the oven on the same temp so you run it less, or dishes that both use the grill. I love grilled vegetables and I can also grill chicken or hamburgers along with it for him. Lots of meat is cooked in the oven at 400 or 450 and I can make a casserole and put it in along with it, then they are ready at the same time.
5. Do as much prep ahead when get home with groceries or when you have time on weekends. I try to make extra dishes that freeze well and put food into the freezer, then I just pull it out and put it in the oven while I make something for the other person, then it doesn't feel like I'm cooking as much on those nights because I only have to make one meal.
I hope this will help others who are in the a similar situation, I know when we first got married it took a long time for me to figure this out, and lots of things were burned as a result.