Question for my Readers

So I have a great collection of readers and followers here.

I have RPG types, Horror fans and para-normal/supernatural authors and fans.  A great group really.

So here is a question for you all that I have been pondering the last couple of days.

Given you have only "mundane" means, how do you kill a ghost?

I was thinking something like a shotgun full of rock salt or something.  Silver buckshot?  Something else.

What do you all think?