Add diced avocado to a bowl, followed by remaining ingredients for guacamole. Stir until mixed. Be careful not to over stir; avocado pieces should still be a bit chunky. Store in a lidded container. In a non-stick pan on high to medium-high heat, add a tortilla and cook for 1 minute, or until browning occurs, then flip with a spatula. Place finished tortillas in a bowl lined and covered with a moistened towel. In a large pan, on medium heat, brown the ground beef and drain remaining fat. Add remaining ingredients. For taco meat: Simmer until water has evaporated. Fill each taco with meat mixture, guacamole and optional toppings (eg. jalepenos, cheese, hot sauce), and serve.