since it seemed to be so popular the first time 'round...
the|alternate|universe|memeONE. list your characters (journal names optional).
TWO. others reply with one of those characters or a pairing for you to write; platonic or romantic is up to you.
THREE. pick five cliché AUs from this list (complete with explanations!), and write something of any length - a sentence, a paragraph, a drabble, or a full-length ficlet, if you'd prefer - for each of those five AUs, involving that character or pairing.
...again, stolen off of adddictions. I have no shame.