I have two fabulous methods. The first is to pick out a lobster at your supermarket, ask them to steam it for you, go collect your other groceries, collect your steamed lobster and then get someone else to take the meat out of the shell for you. Alternatively, some supermarkets (thank you Wegman's) carry shelled lobster, usually wherever they have the frozen seafood. My favorite brand is Cozy Harbor. It's pricy, but you're worth it!