My in-laws, from south Louisiana, turned me on to the two pot method about 10 years ago and I have never looked back. Had heard about it prior to that but never used it. They used to make fun saying without the two pots I was cooking "Texas Crawfish" and they were right, there is no comparison.
In the boiling pot bring plain water to a boil, you can add some spices here but I have heard you can boil in plain water. I always add a little spice. Boil till crawfih float to the top, going to be different time for everybody depending on the size of your pot and haw many crawfish you are boiling.
The soaking pot... get the water at a consistent 120 degress. Add butter, lemons, cayenne pepper and a dry rub, I use swamp dust, if you cant find it you can use Tony's or Slap Yo Momma. Transfer the boiled crawfish immediately to the soaking pot, this will raise the water temp to around 130 to 145 degrees, anything over about 165 will continue to cook the crawfish and the meat will become soggy. You can soak in the soaking pot for as long as you want. I usually start about 15 minutes for the fist pot and work my way up, the last pot I will leave in for 45 min and they are on fire when they come out, but full of flavor.
Then transfer the soaked crawfish to your ice chest and sprinkle with what ever dry seasoning you used and let sit for 15-20 minutes before serving.
[This message has been edited by victory (edited 3/24/2014 7:32a).]