If a clam doesn’t open after cooking, don’t force it. It’s a dud, so just toss it away. And make sure you have a bowl for shells on the table—nobody likes a messy lap.
Cooking clams is also a great party trick. People always think it’s so sophisticated, but really, you’re just steaming shellfish in a pot. You can call it “a rustic seafood affair” and sound like a pro.