Drain the fat after browning so the beef isn't greasy in the taco. Warming the tortillas makes a huge difference — a cold tortilla breaks and tastes flat. Taco meat reheats beautifully, so make a double batch for taco salads, burritos, or nachos. Toppings: shredded cheddar, lettuce, diced tomato, sour cream, salsa, guacamole, lime, and cilantro.