Run a lime wedge around the rim of a margarita glass and either sprinkle salt around it, or dip into a small plate of salt.

In a cocktail shaker, add everything except for the lime and olive garnish. Add a large handful of ice.

Shake thoroughly until everything is well mixed, and ice cold.

Strain into the salt-rimmed margarita glass.

Garnish with a lime wedge and olive in the glass.

Voila, here you have a Perfect Margarita!