Originally written in 2005.
Tequila; Cabrito, Coraszon, Don Julio, Sauza, Cuervo, yada yada. Just make sure it's not in a plastic bottle.
Don't use anything other than lime juice that is taken from actual limes... no pre-bottled stuff.
The best margarita in the universe is the C & C, Corazon and Cointreau, served on the rocks, without salt. But like we said, it's for you trustafarians out there.