-Before searching for an easy way to cut watermelon, you should know first how to buy the perfect melon in the store. -Tap or knock on the fruit. If you got a satisfying hollow sound, then this is the one that indicates that it is a ripe and juicy watermelon. -Pick up the matt, not a shiny one. -The rind shouldn't be scratched easily. -The rind shouldn't have any holes. -Whether the juicy watermelon is small or big, it should be heavyweight. -The pale spot (field spot) in it should be creamy yellowish (ripe), not white.