1- Observe the shelf life by indicating the freezing date of foods with a label
2- Empty the air from the freezer bags
3- Never freeze eggs, cheese or mayonnaise
4- Never refreeze thawed food
5- To freeze the fruits:
First wash them, dry them and divide them on a plate, so they do not touch each other.
Put them in the freezer. After an hour, when they are difficult, place them in a bag, the contact no longer matters.