Found Item, which reproduces t-shirts from films, just rolled out their annual Halloween costume guide, with a handy checklist of all the items you need to pull each character off. "The point is that anyone can do this, usually with items around the house or local thrift store. (And our shirts, of course.)" says FI's Travis Greenwood, who (full disclosure) once humiliated me in front of all the "coolies" at the Reed College coffee shop during freshman orientation week by refusing to sell me cigarettes even though I was TOTALLY 18. Anyhow, they're easy. You can see them all here, but my I think my favorite is Slater from Dazed and Confused:

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"Oh, man, I'm fuckin' wasted."