Help! My barbeque yesterday was great except for my lousy margaritas! I've tried numerous recipes and they are never very good. Yesterday's was fresh lime juice, cointreau, and Cuervo Gold. Too strong and missing something...I don't know what. I poured it into a pitcher and added salt to the rim, a lime to the glass--but still not very good. Please point me in the drection of a foolproof margarita!