Let the brisket come to room temperature for 20 to 30 minutes
Preheat the oven to 250°F
Place the brisket in a baking dish or roasting pan
Add a little beef broth, water, or reserved juices to keep it moist
Cover the pan tightly with foil
Reheat until the internal temperature reaches 165°F
Check the brisket every 15 to 20 minutes
Slice only after reheating if possible
Reheat sliced brisket with extra juices to prevent drying out
Use a low and slow method to avoid overcooking
Rest the brisket for 10 to 15 minutes before serving