Supermarket Xmas Boost Earn a year's interest (up to 6%) in a day

How to do it. Simply pick up an Asda card in-store and pay into the account at any till. Those with between £49 and £96 get a £1 bonus, those with £97 to £143 gain £3, and those with £144 get £6.

Add the money by Sun 18 Nov and the bonus will arrive on Mon 19 Nov. Don't spend the cash until the bonus arrives.

To check your balance and top up online, register your card. Plus if it's registered, Asda lets you transfer the balance to a new card if you lose it.

There's no limit on how many cards you can get, and you have two years to spend the balance. You don't have to spend all the cash on the card in one go.

Anything to watch out for? Remember, as with other supermarket savings schemes, the cash must be spent at its stores. You can't use the card balance to pay for petrol or lottery tickets.

How to do it. Simply pick up a card from the stamp machine at your nearest Tesco store. There's no limit on the number of cards you can pick up, and you can use as many as you like in one transaction.

So any time you're shopping in-store at Tesco in December, buy a stamps card to pay for it, and get £1 off for every £49 you spend.

Anything to watch out for? The card has no expiry date, though you must spend in December to bag the bonus. Plus as it's just a piece of card, if you lose it, the cash has gone for good.

How to do it. Pick up the card and stamps from the till at your nearest Morrisons. The card has no expiry date, though you must spend in November or December to bag the bonus. You need to spend the card in one go.

Anything to watch out for? There's a maximum of five Saver cards per household, though you can use as many as you like in one transaction.

How to do it. Pick up a booklet at any Co-operative Food store and buy the stamps at the till. The card has no expiry date, though you must spend in December to bag the bonus. You can get as many cards as you like.

Anything to watch out for? Cards can't be used in Co-op concessions (such as Peacocks or Greggs) or on petrol, anything from the coffee shop or lottery tickets. You can only use the card in-store, not online.

Look after your booklet, as you can't register it online. If it gets lost, you lose the cash.

How to get it. Cards are electronic, and you can pick them up in store and add your bonus at the till.

Once you've a total of £99 (£96 of your savings, plus three of bonus payments for each savings level), you'll get an additional £3 bonus. So that's a total £102 on your card for a £96 load.

You can get as many as you like and it pays bonuses all year round. You don't have to spend all the cash in one transaction.

Anything to watch out for? You can't protect your card by registering it and it can't be redeemed online, so be careful. The bonuses can't be used for lottery tickets, gift cards or postage stamps.

How to do it. Pick up cards and £1 stamps from its saving machines in stores. You get a £1 bonus at the £29 and £49 levels.

Alternatively, apply for an electronic Bonus Card in-store. The payout's better - for every £25 you load, a £1 bonus arrives in your account within 48 hours.

The downside's it takes up to four weeks to arrive. Ask the cashier to load the cash onto the card.

What to watch out for? The electronic card (and the cash on it) will expire if you don't use it for 24 months.