To ensure that the chicken in your casserole remains moist and flavorful, consider pulling it apart while it’s still warm. Warm chicken is easier to shred and tends to absorb flavors more effectively than when it's cold. Additionally, if you're looking to add a bit of a crunchy texture to your casserole, try mixing in a handful of toasted slivered almonds or pecans into the Ritz cracker topping for an extra layer of flavor and crunch.