Click on the map and google maps will help you to find your way once you have entered where you are coming from.
Taxis are available at Tegel airport as well as Schönefeld airport at any time of the day. In both cases the price will be around €30 and take around 30 Min.
A taxi from Ostbahnhof will cost under €10 and take about 5 min.
One of the biggest taxi companies is 'Funk Taxi' and can be reached at: 030-26 10 26 or through their website.
By Feet (Map):
From Ostbahnhof (S3, S5, S7, S9, S75): Walk from the Ostbahnhof towards the River Spree. Turn right on the Spree. After 600 feet you will hit the Engeldammbrücke. Turn left and cross that bridge. Once over the river you will see Köpenicker Strasse. Turn left into the Köpenicker Strasse and you will hit the Eisenbahnstrasse after 3 blocks. Turn right on the Eisenbahnstrasse. House number 19 will be on your left after 300 feet.
From U-Görlitzer Bahnhof (U1): Coming from the center of Berlin leave the Görlitzer Bahnhof in the direction the train came from. Walk parallel to the tracks for 500 meters (1/3 of a mile) till you hit a big church located at Lausitzer Platz. Turn left right after that church. After 200 meters (600 feet) you will hit Eisenbahnstr. House number 19 is on the right side 3 blocks away from Lausitzer Platz.
From U-Schlesisches Tor (U1): Coming from the center of Berlin leave the U-Bahnhof Schlesisches Tor in the direction the train came from and turn left into Köpenicker Strasse. Eisenbahnstr will be on your left after 500 meters (1/3 of a mile). House number 19 is about 100 meters (300 feet) on your left side.
By Bus or Train:
Europe is a part of the world where public transport actually works and gets you where you need to go in a reasonable amount of time.
The fastest and simplest way to plan where you need to go is using the web site of the 'Berliner Verkehrsbetrieben'. Just enter where you are and where you need to go. Here the links to Berlins U- and S-Bahn system as well as the link to 'Deutsche Bundesbahn' who runs most of the trains in Germany. Both sites provide a version for English speakers.
These websites can also be used to find your way to either Schöneberg airport or Tegel airport.
From Schöneberg airport: EasyJet and Germanwings are two inexpensive European airlines who both service Berlin Schöneberg and serve a lot of interesting European cities.
From there you can take the S-Bahn express train (or the S-9 train after hours) to the "Ostbahnhof" train station (the trains originate at Schönefeld so you can only go one way). From Ostbahnhof you can take the #140 bus to the corner of Manteufel Strasse and Köpenicker Strasse. From there walk two blocks south on Köpenicker Strasse to Eisenbahnstrasse, turn right and berlin19 will be a few buildings on your left hand side. You can also walk (see section By Feet) or take a cab.
From Tegel airport: Take the bus TXL "Hauptbahnhof" (main train station). At the 'Hauptbahnhof' transfer to the Buslinie 147. Just be careful because there are two 147 routes, a shorter and a longer one. Take the longer one, which goes to "Puschkinallee/Elsenstrasse" Exit at Eisenbahnstr. (the stop after Manteufelstr.). Turn right into Eisenbahnstr. after a couple of houses you will see number 19 on your left.