Tomatoes

It is not necessary to keep the tomatoes in the refrigerator. In fact, this will kill their amazing flavor and their texture. So, in order to enjoy the most of this food, keep them on a counter, this will allow them to ripe to their full potential. However, try to avoid putting them within the sun reach.

 Milk

Milk is very sensitive to temperature fluctuations every time the door is open. For this reason, avoid placing it on the refrigerator door. Hence, keep it in the main part of your fridge. Furthermore, if you see that the expiration date is approaching, you can freeze it. It can last even 3 months there. 

Eggs

Similar to milk, eggs have to be stored on the top shelf of the refrigerator. Preferably in their original carton. Also, if you are uncertain that the eggs are not fresh, you can place one in a glass of water: if it sink, the eggs is fresh, while if it float the egg is old and probably not so fresh.

Onions

There is no need to keep onions in the refrigerator. In fact, you can store them in a mesh bag or even an old pair of pantyhose (a very unusual system). Put them in a dark and dry place, like the back of a pantry or hanging behind a door.

Cheese

A way of storing cheese is to wrap it up firmly in wax paper; because this kind of paper allows the food to breath while keeping it dry. In the same way, after cutting it, you can rub butter on the cut part to keep it fresh. Finally, remember to put it away from stinky food, given that cheese can capture odors.