You will find it useful to know a few Greek words before arriving in Greece. Locals welcome broken Greek and do not take it personally if they break a smile while you are trying simply trying to say thank you, efcharisto. Your efforts will be greatly appreciated.
Although to learn Greek is not so difficult, just give it a try. So many words are of Greek origins, that you might happily discover you know a bit of Greek already. Start with a few common Greek phrases and of course the Greek alphabet.
Below you will find a few links to learn Greek online and if possible for free.
Learn Greek Online
Start with the Greek Alphabet. Try out a tutorial at: I Learn Greek | Lesson 1. Continue with simple Greek for Beginners. Lessons on modern Greek Grammar: Forthnet.gr. Learn how to Read Greek at Ukindia.com. View fun articles that combine Culture and Language lessons at: HitGreece.com.
An option is to become a member at a Personal Online Language training program and find Tutors from various countries, for approx. 20 Euros per lesson.
If you wish to take it one step further, learn Greek online for free by practicing with a native speaker who is learning your language at: My Language Exchange
My Language Exchange provides classes of small mixed groups (2 to 4 people) of native speakers of two languages. Students interact online and spend half the time speaking in one language and half the time in the other language. It is a fun method to learn Greek and discover the Greek "conversation culture."
Now, when you hear them say: It's all Greek to me, you will get a laugh out of it!
