In this last year or so I've taken an interest in vintage cocktails. Although I have tried several, this is the one I keep returning to. It's called a Corpse Reviver #2, and it indeed revives the corpse I turn into some days after work.
This cocktail is one where the whole is truly more than the sum of its parts. It's got a great balance fo sweet and tangy with a good alcohol kick without being boozy.
The only bad thing about it is that I usually want more than one, and if I have more than two I risk returning to the "corpse" state again.
Most folks probably don't have all the ingredients for this one on hand, but I'll give you the recipe anyway.
Corpse Reviver #2
3/4 oz. gin (I prefer Plymouth but if you can't find it any top shelf gin will do)
3/4 oz. Cointreau (or Grand Marnier)
3/4 oz. fresh lemon juice
3/4 oz. Lillet Blanc (a French aperitif - medium to high end liquor stores will carry this)
Dash Pernod or Absinthe (just a couple of drops - this adds a whisper of anise/licorice)
Combine the first four ingredients in a cocktail shaker with ice. Shake until well chilled. Strain into a glass and stir in a couple drops of Pernod or Absinthe. I suppose you could put the Pernod in with the other ingredients but I like to do it at the end so I can taste as I add to get just the right amount. Garnish with whole star anise.