Keep them Cool and Wet... 

Store your lobsters in your fridge at 36-40 degrees F

Place them in an open container (like a pan or bowl) and cover them with dampened newspaper or paper bags, a damp kitchen towel, or seaweed. 

DO NOT SUBMERGE THEM IN FRESH WATER OR SEAL THEM IN A PLASTIC BAG - THEY WILL SUFFOCATE

Treat them right, they’ve had a rough week.