Audience of Strangers

Answers, broken down into broad categories:

Fire
IIIII I (duplicates: I)

Head damage/decapitation
IIIII III? (duplicates: IIIII II?)

Body dismemberment/destruction (woodchipper, crushed under comet, explosion, acid)
IIIII I? (duplicates: IIIII II)

Any way you'd kill a sleepwalking human
I

Using magic
I

Undoing magic
I

Absolutely impossible because 245-Trioxin's effects are absolutely irrevocable, unstoppable, and you're all fucked
I (John, verbally. I note I believe that in fact electricity will kill a RotLD zombie. He notes it's not his fault I've run through that movie five times this weekend.[1])

Of eleven people, three didn't list duplicate methods in their answer. Mind, two of those three also noted that it depended on the type of zombie (although one said he was assuming stereotypical ones, with which his emphasis on head destruction I am guessing means Romero).

Only one person listed anything magical or metaphysical, or explicitly acknowledged that there might be a supernatural way of dealing with them. (It's odd--I'd have sworn a few of the people that posted know about handing them salt, or filling their mouth with salt and sewing it shut.) I am wondering how corpses rising from the grave became such a mundane issue, or is it another example of how horror movies have a tendency to be frankly neophobic?

Mr. Romero, I love your work. I truly do. But apparently somewhere in there its success has gone a fair ways towards burying the concept of a zombie as something to be dealt with by other than mechanical means.
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[1] It's background noise.