...or what we'd call eating your greens before the chips.
This is how it works. You go to Sainsbury's , traipse round for an hour shoving the same old same old into your trolley , haul it all out of the trolley , onto the conveyor belt, back into the trolley, out of the trolley into the car, out of the car into the hallway, out of the hallway, into the kitchen , off the kitchen floor and into the fridge or cupboard.
The idea is , you do all of that BEFORE you get to do anything nice for the day. Simple ... delayed gratification. Then again , there's always Ocado . It's a no-brainer really.