Legend tells of the great celluloid cowboy John Wayne turning to one of his younger cowpoke friends and uttering the immortal words 'Get off your horse and drink your milk.' (From the film 'There's Rustlers in Them Thar Hills. You Mark My Words Mister.') But we'd all be a lot healthier if we got off our trains and buses earlier and walked instead. Thirty minutes walking per day cuts the risk of heart disease by half.

It'll clear your brain as well, blow the cobwebs away. As my old mum used to say. As she lay on the sofa, six inches deep in dust, drinking a four-pack of Guinness.