If you have the 6/7 seater, get a small squishy stress ball to put in the pocket the 3rd row belt buckles drop into. This will lift the buckles and aid tiny hands to buckle quickly, yet squish out of the way when you fold the seat down.
Keep a roll of paper towels in the frunk. You'll need them on the rare occasion the gull wing door gap or front wipers dump water into the car.
A 50A NEMA 14-50 power cable can be a lifesaver if you're traveling. They work in many RV parks (read some threads on this before proceeding) and most people don't have their dryer outlet close enough to where you'd park.
Consider getting rim guards if you live in an urban area with a lot of square curb gutters and you can't help parking close to the curb.