ATMs are widespread. Credit cards are used in larger hotels and upmarket restaurants, but some smaller hotels and restaurants only accept cash.
Hotels Baggage porters should get about €1 per piece of luggage; car-park attendants around €1.
Restaurants In restaurants where no service charge is included, leave 10% for good service.
Bars Not expected but good to leave loose change if paying by cash.
Taxis Drivers don't expect a tip, but it's nice to round up a fare in order to leave a small tip (up to 10%) if warranted.