Remove frozen food in the freezer and let it thaw inside the fridge.
This helps in the cooling. Do this instead of just putting it outside on the kitchen counter or using the microwave.
There should be at least a 5 centimetre gap between the back of your fridge and the wall to allow the heat to disperse.
A well-ventilated fridge will run more efficiently.
Cover liquids and food stored in the fridge.
Uncovered foods release moisture and in turn get dried out. This process makes the compressor work harder.