First, try not to overload your refrigerator. When the fridge is more crowded with food and beverages, the compressor must work harder to keep everything fresh. It is much better if there is air circulating food.
Also, you can limit the number of times someone opens the fridge door. When the door is open, the temperature inside also drops several degrees, and the compressor needs to work even harder to maintain an optimum temperature. Furthermore, it would help if you kept the door gaskets clean. So, avoid any buildup of sticky food that might end up ruining your refrigerator. Try with warm water and a sponge to clean it up.
Another thing you can do to maintain your fridge is to vacuum off the refrigerator coils along the bottom front or back of your appliance. And, one last thing, don’t forget to through expired or rotten food. It can infect other things and will keep your fridge from smelling fresh.