Coats and bags under the stairs (60 Under stairs storage ideas for small spaces)
IKEA Hackers: Expedit under-stairs storage
More under-stair storage options! by gilda
For Quack Quack's bedroom in the Lower Level of our home... we no longer call it the basement ...
WOW - this is pretty and efficient. Architectural Detail - Under stair storage
Under Stairs storage maybe something along these lines for toys
Storage Solutions for Small Spaces | Space Saving Ideas : Efficiently Using Under Staircase Space on Home ...