Cut a notch in a lime wedge, then run the lime around the rim of a glass. Dip the edge of the rim into a plate of salt (or for a festive look, use Margarita Salt).
Single drink: Place the tequila, Triple Sec, lime juice, and orange juice in a cocktail shaker and fill it with ice. Shake until cold. Strain the margarita into the glass with the salted rim. Fill the glass with ice and serve.
Pitcher (8 servings): Place 1 1/2 cups tequila, 1 1/2 cups Triple Sec, 1 cup lime juice, and 1 cup orange juice in a pitcher. Add 3 handfuls ice and stir until cold.
Notes
*To convert to tablespoons, 1 ounce = 2 tablespoons