"When you get your berries home, prepare a mixture of one part vinegar (white or apple cider probably work best) and ten parts water. Dump the berries into the mixture and swirl around. Drain, rinse if you want (though the mixture is so diluted you can't taste the vinegar,) and pop in the fridge. The vinegar kills any mold spores and other bacteria that might be on the surface of the fruit, and voila! Raspberries will last a week or more, and strawberries go almost two weeks without getting moldy and soft."
I'm totally going to try this next time I buy berries! This is especially helpful when those 3/$5.00 sales are on so you can take advantage of great prices, and not risk any going to waste!
HAPPY SAVING:)