Watch for Premium Score squares. Premium Squares will alter your word scores, so pay attention to these when you play words. You can only use the bonus from a Premium Square if you laid the tile over that square during the current turn. You cannot incorporate bonuses from Premium Squares that you already counted in a different turn or that were counted by a different player.[14]
When adding the bonuses for plays with multiple Premium Squares, add the letter bonuses in before the word bonuses. For example, if you spell a word that has a double letter bonus and a triple word bonus, add the double letter bonus to your total before multiplying the total by three.