I moved the basket of extension cords (which are only used twice a year) to the top shelf, along with cleaning supplies and recipe books. The newfound space on the second shelf allowed me to stash the girls' board games, activities, craft sets and instruments.
The bottom shelves of the closet remained mostly the same. I vacuumed the closet and wiped the shelves.
This closet is being utilized better now and I am so happy with how it turned out!