Russia again
If you say the same word together with someone else, you should touch something black first and then you can make a wish.
If you are sitting against the corner of the dinner table you won't marry for 7 years (only for girls

).
When a person dies they cover mirrors with cloth, as the dead can reflect in the mirror.
If you step on somebody's foot, ask them to step on yours otherwise you are going to quarrel.
It's bad luck to count moles on your body.
Wow.. there are a lot more than these..
Am I right, that in Britain when a person sneezes, you say 'Bless you', and they must clap their hands while saying 'Thank you' back? A girl did that once and it was funny. )