The Margarita is the most favoured tequila based cocktail and rightly so, in my opinion! Margaritas are made together with tequila and either Triple Sec or Cointreau or another orange-flavored liqueur, lime or lemon juice and served in a salt rimmed cocktail glass.
Naturally there are many different variations, however here's my favourite ratio:
* 5 or 6 ice cubes crushed
* 30ml ice cold water
* 40ml freshly squeezed lemon or lime juice
* 10ml Tequila
* 5ml Cointreau (triple sec)
Rim one cocktail glass with salt. Shake the remaining ingredients together, pour into the rimmed glass and serve.
Image from Wikipedia