12-Pair Shoe Organiser from the Container Store - at least you won't knock over neighbouring pairs when taking one out if they're jammed together on a shelf:
Three sofas/single beds in one. family guest room solution. Doesn't look too hard to make either.
Awkward small corner? Use floating corner shelves to create more storage in a small space
PVC pipe shoe rack
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wire organization. You can find these grid walls at store supply warehouse in St. Louis, mo. Ou could definitely put one in our closet too! Awesome idea