To make the space seem bigger....think covering the entire walls with storage shelves 12" or less deep. I put a row of hooks across the tops of a row of shelves and use it for a design wall, to hang a design curtain made from a flannel backed plastic tablecloth especially if boxes of notions or batting is stored behind it.
Once you have got all the same things together - a rule museums use for storage - to save space...
You just might be surprised at how much space you really do have!