Heat oven to 325ºF. Mix butter, sugar and vanilla well. Stir flour, salt and rolled oats into butter mixture. Then with fingers, shape teaspoonful of dough into rounds, balls, crescents, triangles and bars. Bake on ungreased baking sheets for 20 to 25 minutes or until golden around edges. Cool. Melt chocolate; add milk; blend until smooth. Dip cookies, rounded side down, in chocolate; then dip in nuts, coconut or chocolate jimmies.