Corn, potatoes, sausage... sure. But what about a whole Redfish? Ever add anything unusual to your crawfish boil? Here are some you might want to try:
Hot dogs - great if your kids like a little spice
Artichokes - next best thing to a stuffed artichoke
Ravioli - use a nice big cheese ravioli to help it keep it's shape and add after everything else comes out
Spam - fun twist on the sausage
Whole fish - clean the fish, wrap it in cheese cloth, poach it after everything else comes out of the boil.