Shalom - peace, hello, goodbye
Boker tov - good morning
Erev tov - good evening
L'hitra-ot - see you soon
Todah - thank you
Todah Rabah - thank you very much
Ken - yes
Lo - no
Slicha - I'm sorry, excuse me
Bevakasha - please, your welcome
Mazel tov - congratulations
Sheket - quiet
Achat - one
Shtayim - two
Shalosh - three
Sha'alu Shalom Yerushalayim - Pray for the Peace of Jerusalem
Want to learn more? go to http://www.jewishfederations.org/hebrew-words-and-phrases.aspx