Get trade down product suggestions
Supermarket comparison site
Mysupermarket* includes a 'trade down' option based on the Downshift Challenge theory. So when you enter your shopping trolley, as well as comparing the price of all your items across online supermarkets, it gives you the downshifted option too.
This is a quick system and a great way to see the scale of the savings, even if you don't shop online.
Downshift cleaning products & toiletries too

Rather strangely, reports show people are more likely to stick with branded washing powders, shower gels and other cleaning products than food. Yet these products don't even need tasting and the saving is huge. So try downshifting these too.
Then again, old-style MoneySavers wouldn't forgive us if we didn't say you can clean the whole house with white vinegar and lemon juice (read more on
Old Style Cleaning and full info in the charity
Thrifty Ways book).
Find the tastiest own brands
Everything from shortbread to Chardonnay is covered by
The Supermarket Own Brand Guide, which reviews supermarket's own brands. It pits them against their brand name rivals and gives a mark out of 10.
Reviews are written by food critic Martin Isark. He’s gradually tasting his way through the big supermarkets and has reviewed more than 10,000 products from Aldi, Asda, the Co-operative, Lidl, Marks & Spencer, Sainsbury's, Tesco, Morrisons and Waitrose.
He says own brands can smack the bottoms of posh ranges, even when it comes to taste. You definitely don’t always get what you pay for.
Hunt for disguised own brands
After the Downshift Challenge, many people will be tempted to ask, “is there actually any difference between normal brands and own-brands?” Often they’re made in the same factories.
To help break through this, there's a discussion in the forum, which asks any current or past factory workers to dish the dirt on whether there's really any difference. Of course there’s no guarantee it’s true, but it makes fun reading.
For an ITV programme, Martin got a scientist to examine some own brands and compare them to the main brands. Surprisingly, almost none were nutritionally identical. The conclusion was small differences were deliberately added so no one can say “they’re the same”. Even so, they’re often very similar in taste, so it doesn’t matter too much.
Never shop when hungry
OK, so it may sound obvious, but it's true: if you're hungry, you’re more likely to buy things you don’t need.
Plus beware pick-up shops. If you pop into your local shop on your way home to buy a pint of milk as a catch-up midweek, don’t pick up a basket. Do that, and you’ll generally fill it. If you want a pint of milk, buy a pint of milk then leave.
Compare the cost of your trolley

Compare the cost of your shopping trolley at the major online supermarkets with
Mysupermarket*.
It looks at the biggies: Tesco, Asda, Waitrose, Ocado, Aldi, Morrisons and Sainsbury’s. For toiletries, it checks Superdrug and Boots. The prices are often reflected in-store, so even if you're going in person, it’s worth doing a check to see which is cheapest for you.
As you enter your data, Mysupermarket also suggests alternative options that may be cheaper. For example, if you’re buying two six-packs of cola and a 12-pack is cheaper, it lets you know.
Take couponing to the max
Extreme couponers source, gain and hoard hundreds of product and store coupons, then combine them for huge code-stacking discounts.
Many have astonishing success, such as forumite Purple Sarah: "I got £67 of shopping for 11p after offers and coupons. I used £39.50 of Clubcard coupons, £5 off 40, a price promise and other coupons."

Don't get 'ad by special offers
In February 2013, Which? investigated the price of 700,000 items on sale at the five big supermarkets and found some special offers were more expensive than products not on sale.
Supermarkets' tactics included upping the price per item when products went into a multibuy offer and exaggerating original prices to make special offers seem cheaper.
For a collection of nonsensical offers from supermarkets, see our
When Promos Go Wrong guide. Users sent us their best spots, eg "Air freshener 75p each or 2 for £5!", and in best Tony Hart fashion we compiled a gallery.
Track if it's really a bargain

Most of us know just because a supermarket lists an item as "on offer", that doesn't mean it's cheap. The trouble has been sorting awesome offers from pants promos.
To help, supermarket comparison site
Mysupermarket*charts products' price histories to show if a supermarket's 'was' price is realistic.
How to do it: Simply sign up to Mysupermarket for free, then search for an item. On its page, scroll down and you'll see a chart of the supermarkets' average prices for that product over the last year. Results can be fascinating.
Set up a price alert.You can get price alerts on your favourite groceries – ideal for stocking up on favourite items that don't go off. Search for a product, click 'add price alert' and Mysupermarket fires off an email as soon as the price drops in one or more stores.
Grab online supermarket vouchers
Online supermarkets commonly put out introductory discount vouchers to 'capture' new customers, eg £15 off a £50 spend at Waitrose.
Special offer run out? Get a rain check voucher
If a special offer item is out of stock, some supermarkets will give you a voucher. Here’s a couple of examples:

Asda Smiley Vouchers. Asda staff are allowed to give out 'Smiley Vouchers' worth up to £1, when a customer's had a problem or something isn’t quite right. One of these reasons is that a special offer product's out of stock. Again, vouchers are at shop assistants' discretion, so a friendly smile goes a long way.
You can spend the vouchers on anything at Asda except tobacco, alcohol and lottery tickets.

Sainsbury's Special Coupons. If a special offer's run out, Sainsbury's shop assistants dish out Special Coupons, allowing you to buy the same product from a different brand at the special offer price.
For example, if it was doing 500 bags of PG Tips for £1, you'd be able to get 500 bags of Tetley for the same price - even if the usual price of both isn't the same.
It’s at the shop assistant's discretion and some haven't heard of them, but MoneySavers report that politely explaining about the coupons can help. Coupons must be used on the same day as you get them.
Consider less choice, lower price supermarkets
When shopping in-store, consider
Lidl and
Aldi too if you haven’t before. These can often prove cheaper than the other big supermarkets – many shoppers go once a month to buy all their staples, then use the big four for the rest of their goods.
Get further money back with cashback
Once you've found the cheapest groceries, you may be able to get paid cashback on top. A number of sites get paid by online stores for sending traffic then give you a cut - full information and warnings in
Top Cashback Sites.
Know when to BOGOF

Bogof! No, not you! BOGOF stands for ‘buy one, get one free’. Often there to 'exploit' our impulses, these can be a menace or an angel.
The time to grab 'em is when the BOGOF (or three-for-two or half-price deal) is on something that won't go off that you'd buy anyway. Classic examples include toothpaste, bog roll and batteries.
Loyalty schemes don't give something for nothing
Supermarkets use sneaky tactics to keep us in their store so we don’t take advantage of competitive markets.
Don't think loyalty schemes, such as Tesco Clubcard and Nectar, give you something for nothing. Loyalty points schemes are incorporated into pricing policies. So the golden rule is: choose where to shop on price, not because you get points, but always get points when you're spending there anyway.
Reclaim old Clubcard vouchers
Flash your Clubcard at Tesco and you bag one point per pound spent. Then every three months you’re sent the points as vouchers - 500 points equals a fiver to spend in-store.

Many lose or forget to use ‘em. But there’s an easy way to claw back the last two years' of unused vouchers (some report successes from even further back).
Log on to Tesco's site and tucked away is a ‘Your Vouchers’ area showing your voucher history, including those that haven’t been redeemed. See
Reclaim Tesco Vouchers for more info.
Also note that a 500-point voucher is worth a fiver in Tesco, but you can trade it for up to three or four times that (ie, £15 or £20) via Tesco Clubcard Boost. Rewards include days out, restaurant vouchers, RAC membership and more. For full info on redeeming vouchers, see
Tesco Points Boost.