Discarding cards involves more than just getting rid of unwanted cards; it also involves making strategic choices that can affect your hand & your opponents'. Think absutta kingout the card's worth as well as how other players might find it useful when choosing which one to discard. For example, it might be prudent to keep your card longer or find another card to discard if it has the potential to finish an opponent's run or set. A balance between defensive & offensive discarding must also be maintained.