PUBLIC TRANSPORT:

From Amsterdam Centraal Station take the stoptrein (slowtrain) to Utrecht Centraal. It normally leaves from platform 7b), at 13.13, 13.43, 14.13, 14.43, etc, every half hour. Then get off at the first stop, at station Muiderpoort (it's a five minutes train ride).

From Muiderpoort Station: Walk down the stairs, then turn left, walk underneath the train station, turn right straight after the train station (there are trams parked there, the shop at the corner is called Carmen). After 50 take the first street to the left, and then immediately, you're there: Minahassastraat nr 1, on the left side. Ring the bell where it says eyfa...

By Bus:
Eurolines international services stop at Amsterdam Amstel Station. From here, you can get the train directly to Muiderpoort Station (as above). Trains leave from platform 1 at 27 and 57 minutes past the hour.
Local bus number 37 will also drop you off on Insulindeweg, by Muiderpoort train station. From here, follow the road until you reach the shop 'Carmen'. Follow the tram line to the right of this shop and take the first left. You are now in Minahassastraat, outside number 1.

by Car:
At the A10, the road circling around Amsterdam, take the exit S114 Zeeburg. Then at the traffic lights turn left. Then it's around 500 meter to the first main traffic lights. Turn left there. You'll cross a bridge over the water. After the bridge keep following the road, which is turning a bit to the left and then to the right. This street is called Insulindeweg. Go straight at the traffic lights, another 500 meter until the trainstation Amsterdam Muiderpoort, which is crossing over the road. Turn right before the trainstation, and find a parking place. Walk back to Muiderpoort trainstation and follow the instructions above.
by Plane (...if you must, but please try to avoid it!) :
From Schiphol airport, get the train to Amsterdam Centraal. From here, there are many connections to Amsterdam Muiderpoort.