u003cstrongu003eMicrowave: u003c/strongu003eBrush meatloaf with leftover cooking juices or beef stock. Place in a microwave-safe plate. Cover the plate with a damp paper towel. Heat for 30 or so seconds at a time, turning the meat as need it.u003cbr/u003eu003cstrongu003eOven: u003c/strongu003ePreheat oven to 250º F. Brush meatloaf with leftover cooking juices or beef stock. Place in baking dish. Cover with foil. Bake until heated through.u003cbr/u003eu003cstrongu003eSkillet:u003c/strongu003e Place meatloaf in a skillet, add a couple of tablespoons of leftover cooking juices or beef stock, cover, and reheat over medium heat, turning the meat as need it, until heated through.