if it's warm where you live, you HAVE to go with a reeeaaally good G&T (Gin and Tonic)
-chilled highball glass
-fill up (!) with the coldest ice you can get
-add some good Dry Gin (Tanqueray 10, Bombay Sapphire (yeah i know, half the poeple love it, the other half hates it - just give it a try), there are some really flower-y spanish Gins, too) (not chilled)
-fill up with good Tonic Water, like Schweppes
-Gin to Tonic ratio should be somewhere around 2:1 - 1:2 or anything in between (i like them a bit stronger

depends a lot on your Tonic Water and the Gin)
-add a few drops of lime juice or a slice or whatever - just enough so you can taste a hint of lime through the mix - but always (!) the juniper on top of everything else, mind you!
OR just grab a good European beer, if you can get your hands on it. Polish, Czech, German, Irish,...
never wrong, goes with anything, anywhere, anytime, anyone

but DON'T trust a beer in a green bottle!!
and drink responsibly.
seriously, you chilling in your own puke ain't cool. never.
texting or calling people in the middle of the night and talking about whatever crap comes to your intoxicated mind isn't cool either.