1. Take all my money out of the banks.
2. Buy several goats, chickens, rabbits, and guns. If there's any left over, perrenial fruit & nut trees.
3. Breed the above animals and protect them using the aforementioned guns. Additional security (family, friends) required.
4. Barter eggs, milk, and rabbit meat for the things I need. Make connections with the people that have stuff that I'll need.
5. See what happens.
Getting some renewable energy would be up on the priority list, but as you can see I have a very survivalist slant :D

Let's have a thought experiment.
Translate your circumstances. You are a Greek citizen. You work in Greece, your family is in Greece, most of your contacts are in Greece. What are your thoughts? What are you doing today? Are you one of the people who has taken your money out of the banks? What are your plans - especially if you cannot leave.
Or, come from the point of view of someone giving advice to an ordinary Greek person. Bonus points if you have contacts in Greece and can tell us what they're thinking, what they've been doing, what their plans are.
Quick background:
http://www.spiegel.de/international/europe/0,1518,802051,00.html