Menu manipulation (Peter Dazely - Getty Images)

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Speaking of eating out, restaurants are well-versed in the art of squeezing more cash out of you. Take a look at the menu: items they want to promote are placed in the right-hand corner where your eye is naturally drawn.

Then there are the terms used to make items seem more appealing. Terms like 'indulgent' or 'warm' are commonplace, and then there's the age-old trick of using foreign words to make the mundane seem exotic (crème Anglaise instead of custard, for example).

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