It's a good idea to buy tickets for express trains a few days in advance, however, as these trains are new, comfortable and very popular . The Greek National Tourist Organization provides a ferry scedule updated weekly. If you encounter difficulties, most travel agents can provide assistance. Ilios Lines' fleet is based in Rafina and serves the Cycladic islands. Many buses leave from the huge bus stop at Academias and Sina Strs to the northern suburbs of Halandri, Psyhiko, Maroussi and Kifissia.
All buses have their route number and destination on the front.
Athens' metro system is now being expanded. Tipping is neigher expected nor practiced, though it's customary to round off the fare. Although you will occassionally see signs for taxi stands in central Athens, you'll seldom find taxis there. It is rare to get a cab to yourself during rush hours, so expect other people to be in the cab or to pick up others heading in the same direction after you're already in. If you have to be somewhere and want to reach your destination on time with a taxi, it's advisable to call one.