How to keep a Vampire in a coffin/grave

[Leiko]

This only works for vampires that sleep in coffins.

Put iron around the grave I can't tell you why this works (because I'm not sure myself), but it does.

Put garlic on the grave See ways to ward off a vampire.

Put a fence around a grave Common sense comes in here, thus me not feeling a need to explain it.

Put a pile of stones on the graveOnce again, common sense.

Pouring boiling water on the grave Okay, I guess this works as long as the ground is hot? Or maybe it has to do with the pureness of boiled water?

I'll post more later.