Crawfish boil help

Guys I know there has to be a recipe but I can't seem to find it lol. So need some help here. I have onions, potatoes, corn, garlic, lemons, anduille sausage and of course the crawfish. I can't remember when to do the taters... I assume in the very beginning before I add the crawfish, but I could really use some quick help here.
depends how soft you want them.

real soft- soon as you start the burner
bout 15 min or so after you first light the burner

just be sure to check them periodically during soak - if you soak 20 min or so they will get soft(er)