Susan's {never fail} Chocolate Chip Cookies

1 lb. butter or marg
2 C. brown sugar
1 1/2 C. sugar
3 eggs
1 Tb. vanilla
1 1/2 tsp salt (she halves this)
1 1/2 Tb. baking soda
6 C. flour
2 C. chocolate chips

cream butter, sugar and salt together in mixer.
add remaining ingredients
on greased cookie sheet, bake @ 350 for 10 minutes