There are countless versions on how a margarita was invented and the most popular versions are as follows :

-- In 1948 a socialite called Margaret Sames was hosting a party at her cliff side house in Acapulco, Mexico. Among her guest s was Conrad 'Nicky' Hilton of the famous hotel family ( the one Paris belongs to ). Looking for something to pep up the party, Margaret began to experiment at the bar and created the first Margarita.
-- Pancho Morles, a bartender from Juarez, Mexico was asked to make a magnolia but couldn’t remember the exact ingredients so threw something together. Although it wasn’t what the lady asked for but she loved it - her name was margarita.

PREPARATION :

Run the rim of a cocktail glass with lime juice and dip in salt. Shake all ingredients with ice, strain into a margarita glass and serve.

GARNISH :

Lime slice

Different Styles :

Straight Up: Combine ingredients with ice in a shaker. Shake 20-30 times then strain into chilled margarita glass. Garnish with lime wheel.

On The Rocks: Combine ingredients with ice in a shaker and pour into rock glass filled with ice. Garnish with a lemon wheel.

Frozen : Combine ingredients in blender with 1 cup of ice. Pour into large margarita glass and serve with lime wedge.