9. Consider own-brand goods
Not all own-brand supermarket products these days come with a health warning and a stomach pump. They don’t need to. Some are quite good. Obviously, the modern supermarket trick of reducing the size of the packaging and the weight of the contents means you can buy a 24-pack, multi-sack of crisps that between them only contain the shavings of one potato but you can still buy a tin of Sainsbury’s own-brand baked beans for 25p and a loaf bread containing grams of protein at Asda, Sainsbury's or Aldi for 50p. Enough said.