How do I make groceries last the whole week without throwing food away?

Most of the week’s waste is water, cold in the wrong place, and a block of meat that cannot be dinner tonight. Six pages are here: five fix one each, and the sixth is the sum to do before you buy a chest freezer.

Put a dry paper towel in the bag. A dry paper towel in the bag says leaves mostly do not spoil because time has passed; they spoil because they are sitting in water, the condensation that collects inside any sealed bag in a fridge. Greens want humid air and dry surfaces, and the towel removes only the wet surfaces. Change it when it goes damp. The page also retires a tip you may have heard, pick the flattest bag of salad: how full a bag looks is a property of how it was packed and shipped, not of age, and people who work with the stuff said the reverse can be true. Look for water beading on the plastic instead. Herbs stand in a glass of water like cut flowers; carrots keep for over a month submerged in water in a closed jar; keep fruit away from leaves, because some fruit gives off ethylene as it ripens. Limp greens come back in cold water; slimy or off-smelling ones do not.

Bread belongs in the freezer, not the fridge. Bread belongs in the freezer says refrigerating bread slows mould and speeds staling, drying a loaf to cardboard within about a day. The freezer nearly stops that, and frozen slices go straight into the toaster and come out better than thawed ones. Counter for the next few days, freezer for anything longer, the fridge for neither. And if you get through a loaf in a week anyway, ignore all of it. While the door is open: a few days in a properly cold freezer when a new bag of rice or flour comes home deals with weevil eggs that can arrive with it; it prevents, it does not cure.

Flatten the meat before you freeze it. Flatten the meat before you freeze it is about the brick of frozen mince that will not be dinner for another day. Split it into meal-sized portions and press each flat in a freezer bag; a sheet the thickness of a paperback thaws in the fridge in a few hours or in cold water in well under an hour, and never spends time in the danger zone. Its safety line comes from the people and public food-safety guidance alike: never thaw meat or poultry on the counter or anywhere at room temperature, in warm or hot water, or in the dishwasher, and never put a frozen or partly frozen turkey into a deep fryer.

Float the egg, then smell it. Float the egg, then smell it says many people drop a past-date egg in cold water: fresh sinks, old floats. The correction people made in each other: floating means old, not bad, because the air pocket has grown with age. Crack it and smell it; a spoiled egg smells so foully of sulphur you will not need to wonder. Two lines sit above the test. The smell test is not for an infant, someone ill or someone elderly, and US and UK food-safety guidance adds the reason: salmonella has no smell, so for those people the egg is cooked until white and yolk are firm whatever the bowl said. And US eggs are washed and must stay cold; UK eggs are not.

Frozen fruit is picked ripe. Frozen fruit is picked ripe treats the bag in the freezer as the fruit, not the compromise: picked at its ripest and frozen within hours, cheaper than out-of-season fresh, and it does not turn to fur in the drawer on Thursday. Blend it, cook it, or stir it into hot oats, the places where texture does not matter. The page’s honest exception: near a growing region or in season, fresh can be far cheaper, so compare price per weight in your own shop.

A chest freezer saves money only if you fill it with food you already eat, bought on sale, and can find it again, so decide what goes in and how you will track it before you buy. Work out what a chest freezer will save before you buy one opens with two things that cost the most when they go wrong. Power cuts: a full freezer keeps its temperature for about 48 hours, and a half-full one for about 24, but only if the door stays shut. That is the US Food and Drug Administration’s figure, and Food Standards Scotland gives the same two numbers. A fridge keeps food cold for about four hours. After a cut, the FDA says food that still has ice crystals in it, or is at 40°F (4°C) or colder, can be refrozen, and that you should not decide by smell or taste. If it has warmed past that and you cannot tell, throw it out. An appliance thermometer in the freezer is how you know, and in normal times the FDA says to keep the freezer at 0°F (-18°C) or colder. Plugging it in: the US Fire Administration says major appliances should be plugged directly into a wall outlet, never an extension cord, because a cord can overheat and start a fire. Electrical Safety First, in the UK, gives the same advice for fridges and freezers, and adds to keep them away from cookers and radiators and not to use one outside or anywhere the weather can reach it. If the breaker keeps tripping, or you hear crackling or arcing sounds, unplug it and have it looked at. Many people who own one say the saving comes from buying meat and other staples in large amounts, when they are on sale or from a local source, instead of at the regular price, and one person is blunt about the order of things: the freezer itself only adds a running cost and a risk, and the money is made in what you buy and when. One person says not to fill it straight away but to wait for each item to go on sale, and some people say a warehouse club is not always cheaper, especially for meat, so compare the price per unit with the stores you already use. Some people add that bulk only saves money on food you already use at that rate, and that a cheap pack you do not finish is a loss. One person says not to put the freezer on revolving credit, because the interest can cancel the saving. Some people who own one say the electricity costs little next to the food it saves; the page says to do your own sum, from the energy label’s estimated yearly use in kilowatt-hours (in the US, the yellow EnergyGuide label) multiplied by what your electricity supplier charges per kilowatt-hour. Chest or upright is something people split on, and what decides it, by their own account, is your height and back, whether you will really keep a list, how often your power fails, and how much floor space you have. The page says this is where a chest freezer loses money: some people say food gets buried, forgotten and thrown out. The fixes people give are to sort it by type, so you lift out a layer rather than dig; to keep a list where you can see it; and to date everything and use the oldest first. One person warns not to buy a chest freezer at all if you cannot commit to labelling and rotating what is in it. Against a power cut, many people say a full freezer holds its temperature better, which matches the government figures above, and many say an alarm or a generator is worth having; one person says the alarm built into a freezer is not enough, and that a separate monitor on a different outlet is what warns you. One person warns not to unplug it to free a socket, because it gets forgotten and the food spoils, and another that rolling blackouts, big storms and slow repair crews make a chest freezer a bad fit unless you have backup power. The page says this is probably the wrong tool if you live alone and buy little, though one person says it is harder to justify there and another finds value in bulk buying and meal prep at any household size; if you have no floor space; if lifting or reaching into a deep box is hard for you; or if you will not keep a list. It cannot tell you whether a freezer pays for a renter who may move.

Who this is not for. If food is running out rather than going off, the library’s answer on having no money for groceries is the door, and the frozen-fruit page’s own test applies to everything here: the waste to avoid is food spoiling uneaten, so if you eat it all in a week, none of these habits owes you anything.