Money. Carry an ATM card. One and a copy if the first card gets damaged. Most (all) credit cards charge a 3% transaction fee for overseas use. Set your daily withdrawal limits higher if needed. Some US banks have agreements with overseas banks and no fee is charged. Bank of America can use Barkleys, Deutsche Bank and others.
Tipping. Even if "service included" 5-10% has become customary. The hotel maids here and overseas appreciate your $ thank you.
Safety. Dept. of State travel advisory:
http://travel.state.gov/travel/cis_pa_tw/cis_pa_tw_1168.html
John_AZ
UK, East/West Europe