Perhaps you could hang Ikea Trones (shoe storage) on the wall running up the stairs? You could get multiple colors and alternate them, or wall paper them, or add initials for each member of the family. They'll also make good storage for mail, magazines, hats, gloves, mittens.
I was also thinking those baskets that fit on the stairs could be handy here:
https://www.houzz.com/products/wicker-stair-basket-prvw-vr~110325547
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