Both are already packed (sunglasses & sunscreen).
In fact, we went shopping for new sunglasses for DH and DS a few weeks ago. I got lucky and found an $80 pair of Steve Madden sunglasses at a yard sale for $2 last year.
You may be surprised to know that we do use sunglasses quite often here on the coast. A bit of rain and then sun makes for a vicious glare on the roads! I have a few pair floating around the house, plus one pair always in the car.
And sunscreen is always necessary. Skin cancer runs in the family, so we have both the spray and the cream type packed.
I have had the suitcases opened and in the guest room for a couple of months now and have been tossing in stuff that I know we will be taking that we won't be using until vacation (aka : ponchos, glow sticks, sunscreen, etc.).