Notify your banks

A week or two before your trip, call the banks that issued your ATM and credit cards to tell them the dates you will be abroad and where. Or you may be able to do this online (it is called a 'travel alert'). Otherwise they typically put a freeze on the account once you try to use it in another country, to protect you from fraud. And don't forget about having a 4 digit pin, with the numbers memorized (not letters). Also, do find out the daily withdrawal limit your bank permits from ATMS at other banks; you may wish to ask the bank allow larger withdrawals during your trip.