Preheat oven 300F. In med bowl, combine flour, baking soda, and salt. Mix well; set aside. In lg bowl, using mixer, blend sugars at med speed. Add butter; mix to form a grainy paste. Add eggs and vanilla; beat on med until light and fluffy. Add flour mixture, pecans and white chocolate; blend on low until just combined, Do not overmix. Drop by rounded Tbsps onto ungreased cookie sheets, 2" apart. Bake 20-22 mins or until edges just begin to turn golden brown. Do not overbake. Transfer to a cool flat surface to cool before removeing from cookie sheets.