Greek for Dummies

Here are some Greek words, for those who might go to Greece this year, or maybe just for practice:

Kalimera       = Goodmorning (can be used untill 2 or 3 pm)
Kalispera      = Goodafternoon (can be used from 2 or 3 pm untill late in the evening)
Kalinichta      = Goodnight (From late in the evening, or better, when you go home/to bed)
Yammas        = Cheers! (very importand!)
Ne                = Yes (don't let it fool you during the wedding ceremony!)
Ohxi             = No
Nerroh         = Water
Efgharisto     = Thank you
Parakolo      = If you please
Ena pita gyros parakalo  = A pita giros please!
Mythos        = It's a Greek beer, no need to be translate!