We make Frogmore Stew often, and it's great! I like to use Zatarains crab boil, the kind in the little bag, but Old Bay is good too. Throw in several quartered lemons, quartered sweet onions, a stick of butter, the new potatoes and chunked smoked sausage and let cook until potatoes start to get tender. Then add sweet corn and when pot comes back to a boil, add your shrimp. When they turn pink (just a couple of minutes), remove from heat.
Spread newspapers out on the table, set out another stick of butter and a roll of paper towels for napkins. Yummy!