Leg warmers, a speedo, a viking helmet*, and nothing else! That will get you any job! Note* If you can't get your hands on a viking helmet any epic movie* helmet will suffice. epic movie* by this i mean star wars, LotR, 300, troy, or when harry met sally.
Just go with how you normally dress, be yourself. Just make sure all of your clothes are freshly laundered and that you spend a little more time getting ready than you would if you've worked there for a few months. Showering, wearing deoderant, and wrinkle free clothes are always good. I went to my last interview in a star…