"There are a number of rules which guests should follow.
When entering the yurt it is considered impolite to step on the threshold or to hold onto the ropes.
All weapons should be left outside. Do not point your feet at or put rubbish on the fire.
Do not sit with your back to the altar, whistle, write in red pen, step over older people or point a knife at anyone.
One should take at least a little of any food or drink offered. When offered arak or vodka flick a small amount to the sky, the wind and the earth before drinking."
(reposted from everything2.com)