"Even when she is asleep, you are still half awake, " Mrs Sanders explains.

BBC: 'Always on edge' - a carer's life

And, so long as you've got the laptop out, you might as well join us in 2012 and do all your shopping the way Al Gore intended: Online, half-awake and fully bloated.

CNN: Apparently This Matters: The Boyfriend Pillow

In the study, more than a third said they drank caffeinated beverages and half of these said they did so in order to stay awake.

BBC: Lorry drivers who drink coffee 'cut their crash risk'

No need to keep operators up half the night in Britain when the rotation of the earth provides a wide-awake American alternative.

ECONOMIST: Firms that never sleep