I've built up some fair sized earthen berms using flattened cardboard boxes topped with shredded paper, then leaves, dirt, grass clippings, etc. I got the idea from a book titled Lasagna Gardening. I also use some of the deli containers for storing some items. I too have a problem tossing something I think I may use someday, problem is the hoard builds up faster than the somedays come around. If I had a source for re-cycling the plastic margarine tubs, etc, I would be glad to pass them on, but we can only re-cycle certain plastics. We do save some of the tub type containers to drop off at the church where they are used for leftovers to take home after pot lucks. The plastic grocery bags get tied into a loose knot, saved in a larger bag, and dropped off at WalMart where they collect them for re-cycling.