Strawberries are so wonderful and also so delicate. This link has a good list of tips for purchasing and storing strawberries.
You also need to consider the weather conditions on the day that the strawberries were harvested. Our growers pick right before market on Tuesday. This means that you are getting super fresh berries but if it rained that day or the day before you also will need to use or freeze your berries sooner than if they were picked during sunny and dry weather.