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Organize a few friends or family members for a shopping trip to a warehouse or wholesale store that sells items in bulk. Before you leave the house, make sure you have a list of things you really need, and only buy items that are on the list, Peter suggests. "No bargain hunting or spontaneous purchases," he says. Divide the bulk items into containers and resealable plastic bags for each family. "Enjoy the knowledge that you don't have to find a use for the 4-gallon jar of mayonnaise all alone!" Peter says.