Alternative "Linen Closet"

If you don't have a linen closet like Jim (see his blog on his Linen Closet Makeover) , a quick way to store extra tablecloths, linens and sheets is an underbed box.  I love how the top flap will open halfway so I don't have to drag the box completely out to find what I am looking for. 

How do you store sheets and linens?