I try not to waste anything, and if our council bin was only emptied once every two months, it would still be half empty. Bones only go in it after they have been boiled for stock. Leftover mash is frozen to make fish cakes, or potato cakes. Any veg that is unlikely to keep for much longer is made into soups. Not one scrap of meat or chicken is ever wasted because, although I don't eat meat my husband does, so I cook it for him. The only thing I ever insist on is that no meat is ever left on a plate, and every scrap remaining is frozen to use in pies or casseroles. An animal died to provide that meat, and the very least we can do is respect that and never throw any away. Leftover over greens make lovely bubble and squeak, and stale bread is either made into breadcrumbs or used for bread and butter pudding. Often the meals made from 'leftovers' are nicer than the meals they came from.