That line about holding onto plastic because it "might come in handy" is exactly where I get stuck too. What finally worked for me on the junk shelf was pulling everything out, making three piles (keep, give away, dump run), and giving the "might come in handy" pile a one-year deadline — if I hadn't used it, it went to the dump. I hauled a full truckload of cracked pots and brittle containers to the county transfer station last spring and it was honestly a relief. Now I keep one bin for usable pots, and once it's full, anything extra goes straight out the door. The garden centre take-back is a great find — I wish ours did that.