In large pitcher, combine tequila, lemon juice, sugar and orange liquor; stir to combine. (Note: Margarita mixture can be made up to 12 hours in advance. Keep in refrigerator, covered.)
If using salt, pour onto small plate. Moisten rims of lowball or margarita glasses with a damp paper towel; dip glasses in salt, tapping off excess.
Fill glasses with ice. Pour margarita mixture into each glass (about 3 oz. per glass). Serve immediately.
Not expecting a crowd? For each margarita, use this ratio: 1½ oz. tequila, 1 oz. GOYA® Lemon Juice, ½ oz. orange liqueur and ½ tsp. sugar.