We've all been there. A party is quickly approaching, but you've had no time to prep. Your fridge is disappointingly bare, but showing up empty-handed would be poor etiquette. Do you grab that big ...

Costco party platters with fruit and cheese - Dariusz Gryczka/Shutterstock ...

Costco isn't just a warehouse-style store: it's a retail utopia where shoppers (and their wallets) jump for joy. It's known ...