I love having translucent or clear containers in medium sizes so I can see what's in them without digging too much.
I have 5 small plastic tubs, one of them is Snapware
(Christmas gift), so there are layers w/ easy access (just right for skeins from the ball winder).
I also like to use sweater bags from the Dollar Tree
(they don't sell online, but there is a store locator). I think they're a good size to make 2 layers of yarn--just right for looking at without digging through the bag. These bags can be manipulated to lay nicely on top of each other or squished to fit, which is great for the shelf some of my stash lives on.
My newest place for my stash is a wicker seat with a flip-top cushion & bag inside from Tuesday Morning