Here are a few tips on how to behave with the new currency...
1. Pay in a mixture of local currency and €, preferably all coins. When you almost reach the correct amount, pay with your creditcard.
2. Bite and taste every coin before you actually pay with them, or accept them. Make sure to give some back every now and then and demand another one.
3. Lick every €-note and stick it on your forhead before accepting it. If it falls off, claim it's a fake one and demand for it to be exchanged.
4. Pay bills that are made up in € in local currency. Disregard complaints and keep on blaming the bank for the mistake.
5. Grab an old note of your currency and a new €-note. Cut both in half and stick them together... Keep a straight face when people don't believe you.
6. When paying by credit card, ask at least 3 times if the terminal is € approved. Unless they can prove it, refuse to hand over your card. If they find a way to somehow prove it, tell them you forgot your pincode in all the fuzz.
All the information in this post could be dangerous, and/or considerably shorten your time in the free world. Use with cause. www.friedkitten.com, nor the author of this post can be held responsible in any way.