Thanksgiving is just three days away, so if you’re hosting a feast, it’s getting down to the wire to start on the menu. A frozen 12-pound turkey takes 36 hours to defrost, so that should go into the refrigerator immediately. You can also beat the crowds by shopping for perishable ingredients — fresh herbs and vegetables, salad greens, whipping cream, etc. — early in the week and during the off-peak hours, says the Food Network’s Thanksgiving Countdown Calendar. Tomorrow, you can start prepping dishes that will reheat well on the big day such as casseroles and soups.