After the crayfish have purged themselves you can throw together a boil. That boil can be as simple as salt and water or you can go all out with pre-made boil mixes, potatoes, and corn. I go fairly simple with water, a head of garlic, 1 lemon, salt, bay leaves, and a bottle of beer. If I were going to just eat the tail meat straight, I might do a more interesting boil. But my plain was to cook the tail meat for use in another dish.