1) Never store apples with any other vegetables or fruits. Apples emit certain gases which make the other good items rot. Similarly, never store tomatoes and cucumber in the same compartment as even tomatoes emit gases which can make the cucumber rot.
2) Always store items like eggs with the pointed side downward to keep them fresh longer.
3) Store cheese with a few cubes of sugar in an air tight container as the cubes absorb the moisture from the cheese and help it stay fresh for a longer period of time.
4) Keep a potato in your refrigerator. The potato absorbs bad smells from cooked food or even otherwise and also absorbs gases in the fridge, thus helping other things stay fresher. But you must change the potato every few days.
5) Always store radish in a vessel with water to keep it crisp.
