A little closet just dedicated to accessories- what every girl needs! And completely doable by cutting into an unused (and viable) wall and creating a set-in "box"/closet with a door! I could do this in the back of my walk in closet
Closet studio storage-- this is similar to what I want to do with my office/craft room. Remove the closet doors that slide and put all the supplies and things in there with some nice storage/organization setup.
Garage ball bin - love this design with hooks for helmets and small bins for smaller balls. Use bungee cords in the middle so you can take out balls at the bottom without digging! Plus lots of other garage storage ideas.