Make sure that you dispose of your old fridge or freezer correctly - ask your local council.
Other products may contain other ozone depleting chemicals or chemicals which harm the environment in other ways. Many household cleaning products and even air fresheners can make the air more polluted in a home than the air outside! These may have a detrimental effect on human health too.
Try to avoid spray aerosols; use pump action sprays where possible instead.
Old halon type fire extinguishers should be disposed of correctly.