Should I separate foods before storing them (i.e. fruits from vegetables, meat from fish, etc)?
Raw fish, meat and all types of poultry must be kept separately in airtight packages (Zipper Bags, Slide & Lock bags) and away from all other foods in the fridge. This way you prevent contamination from drips.
It is also preferable to keep fruits separately from vegetables, as well as salami from cheeses.