If you need to address a stranger, or get their attention for whatever reason, you should remember the following:
All strangers (except for children) should be addressed as Вы.
Women in general are Де́вушка! (Miss!) - unless this is obviously inappropriate.
Men in general are Молодо́й челове́к! (Young man!) unless, again, this is obviously inappropriate.
In those situations where В and С are inappropriate, simply use:
Прости́те, пожа́луйста... | Pardon me, please... |
Бу́дьте добры́... | Be so kind... |
Скажи́те, пожа́луйста... | Tell me, please... |