Refrigerate the lobsters when they arrive, either in the crisper or loosely on the shelf.  Cook the lobsters even if they appear motionless.  After cooking, the tail should curl up under the body and the meat should be firm.  Eat the lobsters as soon as possible, the fresher the better.

Do not put the lobsters in the bathtub or sink with tap water.  They will drown in fresh water.