These are probably mentioned, but a few of my favorite not-so-normal things...
1. Pop up hamper - this is super easy to pack and it really helps keep the room tidy - with 5 of us, it's important. It makes carrying the dirty to the laundry (only on longer trips) easy too. To go with this Purex laundry sheets, roll of quarters.
2. Snack suitcase - I bring a box of wine, fits great in frig. I bake several loaves of banana bread for breakfast - bake, slice, butter, freeze, pack before we leave, still cold when we get there! It's nice to have a little taste of home for breakfast! I pack a smaller suitcase with the breakfast bars, Monster trail mix from Target, candy, gum, bananas, apples, Minute Maid juice boxes for the kids, crackers, pringles, cheese (again, freeze, pack morning of, works great) and diet cokes. Then we have an empty suitcase for souvenirs for the flight home - this is always necessary! Saves money on breakfast and afternoon, evening snacks.