Buy the good stuff -- Patron Silver. Add that, with the brandy and Cointreau (or Gran Marnier, alongside the lemon juice, and 1/4 cup powdered sugar. Mix it all up. Drink as fast as possible.

It will feel as though you're riding in a nice Cadillac.... drink too many and it'll feel as though your Cadillac went off a bridge onto the highway below at 80mph ;)