Start With the Temperature and the Zones

Before you buy a single storage box, check that your fridge is actually doing its job. A fridge running at 7°C will let food spoil far faster than one humming along at 3°C, and many of us have never once checked. Pick up an inexpensive fridge thermometer and leave it on the middle shelf overnight. You are aiming for somewhere between 0°C and 5°C. If it reads warmer than that, nudge the dial up a notch and check again the next day. The freezer should sit at -18°C or below, and remember that a well-filled freezer holds its temperature far better than a half-empty one.

It also helps to understand that your fridge is not the same temperature throughout. The door is the warmest area because it is constantly exposed to room air every time you open it, so it is the last place for milk or eggs. The bottom shelf above the salad drawer is the coldest zone, which makes it the right home for raw meat and fish. The middle shelves are the most consistent, ideal for cooked food, dairy and ready-to-eat items.

Give Every Shelf a Clear Job

When everything has a designated spot, the whole household knows where to look and, crucially, where to put things back. Try this arrangement:

• Top shelf: cooked meats, leftovers in sealed containers, dips, soft cheeses and anything you will eat without further cooking.
• Middle shelves: butter, hard cheese, yoghurts, cooked vegetables and opened jars that need refrigeration.
• Bottom shelf: raw meat, poultry and fish, always in a sealed container or on a plate so nothing can drip onto the food below.
• Salad drawer: unwashed vegetables and fruit, kept separate where you can. Some fruits give off a gas that speeds up the ripening of nearby produce.
• Door: condiments, sauces, jams, chutneys, salad dressings and drinks. Not milk, not eggs.

Raw meat below cooked food is not fussiness, it is basic food safety. If a pack of chicken leaks onto a tub of hummus, you have a problem you cannot see.

Label Leftovers and Date Them

The single most effective habit in the whole fridge is a strip of masking tape and a marker pen. Every time you decant leftovers, write the contents and the date on the tape and stick it to the lid. That way nobody has to guess whether the curry is from Tuesday or last Friday. As a rule, cooked leftovers kept in the fridge should be eaten within two days, and anything you are not going to eat in that window should go into the freezer instead, labelled with the same details.

Cool leftovers quickly rather than leaving them on the hob for hours, and get them into the fridge within about ninety minutes. Split a big pot into smaller containers so it chills faster. Keep an eye on use-by dates on meat, fish and dairy, which are about safety, while best-before dates are about quality and are far more forgiving. A yoghurt a day past its best-before is usually perfectly fine; a chicken breast past its use-by is not worth the risk.

Use Clear Boxes and an "Eat Me First" Shelf

Opaque tubs and loose bags are where food goes to be forgotten. Clear containers let you see at a glance what you have, and square or rectangular boxes waste far less space than round ones. Group like with like: one box for cheeses, one for opened packets, one for the children's snacks. A small lazy Susan or a shallow basket on the middle shelf makes jars and bottles accessible without a full-scale excavation.

Then create an eat me first box on a middle shelf. Anything nearing its date, half-used or already opened goes in there. Before you plan a meal or make a sandwich, look in the box first. This one change probably saves more money than anything else in this guide.

Freezer Logic: Flat, Portioned and Labelled

Freezers work best when things go in flat and in portions. Freeze leftovers and batch-cooked sauces in bags laid flat on a tray until solid, then stack them like files. They defrost quickly and take up a fraction of the space. Portion meat into meal-sized amounts before freezing rather than freezing a large pack whole.

Label everything with the contents and the date, and keep a simple list stuck to the freezer door or a small whiteboard nearby. Ticking items off as you use them means you will not discover a mystery joint of meat two years later. Use frozen food within about three months for best quality, and never refreeze meat or fish that has already been defrosted.

The Ten-Minute Reset Before the Weekly Shop

Fridge chaos creeps back within days unless you build in a small routine. Ten minutes before you write your shopping list, do a quick sweep: bin anything past its use-by, move soon-to-expire items into the eat me first box, wipe down any shelves with a damp cloth and check the freezer list. You will shop for what you actually need, waste less, and open the door to a fridge you can see into. That is the whole aim, and it takes less time than boiling the kettle twice.