1 MySupermarket.co.uk

Fill a virtual trolley with your regular shop, wait for the site to tell you which of Asda, Tesco, Sainsbury’s and Ocado can provide the lot for the lowest price, then order it all online.

2 MoneySavingExpert.com

Run by penny-pinching price-watcher Martin Lewis, this site is heaving with information on top deals for everything from credit cards to health cover. Its forum, meanwhile, is full of tips from people even more frugal than Lewis.

3 ReadItSwapIt.co.uk

Never buy another book. List the literature on your bookshelf that you’d happily exchange (you can simply type in the ISDN code of each volume) then go hunting in other members’ collections for swapsies. All you pay is the postage — about 90p for each paperback.

4 HomeExchangeNow.co.uk

This huge site has more than 25,000 international listings for people looking to swap homes for a holiday. Granted, there is an annual £70 fee, but you could save thousands.

5 MyVoucherCodes.co.uk

Of the many sites promising access to the thousands of money-saving online promotional codes, this one is the slickest and — with a claimed 4.5m visitors every month — one of the most popular.

6 PetrolPrices.com.uk

Not much use if you’re in rural Argyll — it’s either the local garage or the one in Inveraray — but for better-connected motorists this postcode-based search engine could save tidy sums when filling up. Registration required.

7 Quidco.com

Sign up with Quidco and when you buy online with any of 1,200 registered retailers, from Argos to Apple, you get back up to 10% of the cost in cash, straight to your bank account — minus £5 for your joining fee.

8 FatFingers.co.uk

Cruel but inspired, FatFingers helps you profit from people whose eBay listings contain a spelling mistake, so hiding them from regular searchers. Type in “Rembrandt”, and that “Rembrant original” with no bids could be yours.

9 LiftShare.com

If your intended travel path is a popular one — from London to Manchester, say — and you are flexible on dates and feel comfortable sharing a car with a stranger, there’s a chance you’ll find a member willing to take you for a share of the fuel costs. Registration is free.

10 Skyscanner.net

Plenty of sites promise to trawl through the thousands of discounted flights available online, but none does it with the ease of use of Skyscanner. And you won’t get bombarded with car hire and hotel deals either — unless you want them.

British internet users are among the most enthusiastic in the world, spending about 25 hours a week online — more time than they do watching TV. Most of that time is spent flicking between the same few sites — which is why InGear is aiming to take you away from the tired old bookmarks you’ve been staring at for years. Each week, we’ll root out the 10 best sites on a single topic, starting with ways to save money. Got a topic you’d like to see covered? Send it to us at tenbest@sunday-times.co.uk. Now get browsing!

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