we have "staples" that we don't let run out that live in the fridge - half of one shelf is tinned fruits and other things like that which we replace as we use them (so if a tin of pineapple gets used we replace it next shop. there is always beetroot, pineapple, peaches etc. the other half of that shelf is cheeses - we buy cheese by the kg as DD likes it, plus we use a lot in cooking so running out isn't something we want to do.

the top shelf is for leftovers from the night before (we always cook more so that i have lunch at work and DH has lunch at home - doesn't take much to bulk out a dinner with extra veg) DD tends to eat leftovers as well. we live out of the main shopping areas (takes about 20k trip to get to a decent shop) so we tend to try to avoid the need for bread. we do buy and freeze, but if we can have leftovers, it is better IMO. also on the top shelf is anything likely to perish any time soon. things like salami or kabana if we buy it for DH, yogurt etc. we do a check of best before dates each week before we shop and either cook stuff that is going to go out of date soon

third shelf has containers with chocolate or choc biscuits, and a container with coffee for DH's coffee machine.

bottom shelf has a drinks rack - it has drinks (obviously lol), celery gets laid on top of the bottles, ummmm, cat food if we use a tin for him and it has leftovers, and then generally a container with table scraps for the dogs)

the crisper gets emptied every week - we will make soup or spag bol or pasta bake and mix everything in before we go shopping again. this weekend DH bought some broc and cauli so i will make vegie bake with that in it at the end of the weekend to use it up. if it is something like carrot/broc/cauli and we don't want to use it immediately, it gets blanched and thrown in the freezer.

we don't have a lot of waste here to be honest. i DO like having a chance to start fresh sometimes, but it's nice to NOT have and empty fridge atm given we're financially not in a great place. it's nicer to know we have SOMETHING we can have all the time lol

ooh, pantry wise - ours is lovely! all tupperware modular mates - if it was a better shape, it would be awesomely organised - i hate that we have to stack stuff behind each other! BUT, nothing in there is out of date. we check everything every few weeks and then pull out anything nearing it's best before, and it gets used. i find it unendingly frustrating though to open food that is in date, and its' stale anyway! tortillas have been terrible for that lately!