Empty your fridge, fill your freezer.
The less your fridge is filled, the less it consumes. So regularly remove spoiled products from here. Still a full fridge? Leave enough empty space between the products so that the air can circulate. The ideal temperature of a fridge is 4 to 6 °C.
Unlike fridges, freezers consume more when they are less filled. Don’t have any food to fill your freezer? Then use styrofoam to fill the holes! The ideal temperature of a freezer is -18 °C. Every degree colder costs 5% more consumption.