Place a large nonstick skillet coated with cooking spray over medium-high heat. Brown chicken. Add water, sugar and seasonings. Cook 4-5 minutes or until chicken is no longer pink, stirring occasionally., Meanwhile, in a small bowl, gently mix avocado, corn, tomatoes and lime juice. Spoon chicken mixture into taco shells; top with avocado salsa. , Freeze option: Freeze cooled meat mixture in freezer containers. To use, partially thaw in refrigerator overnight. Heat through in a saucepan, stirring occasionally and adding a little water if necessary.