Preheat the oven to 250°F to 300°F
Place the brisket in a baking dish or roasting pan
Add a little beef broth, water, or pan juices to keep it moist
Cover tightly with foil
Reheat until the internal temperature reaches 165°F
Check occasionally to avoid drying it out
Let it rest for a few minutes before slicing and serving
Reheat sliced brisket in a skillet over low heat with a little liquid
Reheat brisket in a slow cooker on low with added broth
Reheat brisket in the microwave in short intervals with a cover and a little moisture