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 Девушка! (Miss!) - unless this is obviously inappropriate.
Men in general are Молодой человек! (Young man!) unless, again, this is obviously inappropriate.
In those situations where В and С are inappropriate, simply use:
Простите, пожалуйста... | Pardon me, please... |
Будьте добры... | Be so kind... |
Скажите, пожалуйста... | Tell me, please... |