From the Airport:
Take the Connexxion hotel shuttle-bus to the Barbizon Palace Hotel which is next to the Marriott Hotel. The Hotel Parkzicht is just behind the Marriott Hotel a few minutes walking distance away.
By train from the Airport to the Central Station and from there take tram number 1, 2, or 5 from Central Station to the Leidseplein and walk towards the Marriott hotel.
A taxi from the Airport which will costs around € 40,- and the ride takes about 20 minutes (the Airport is about 20 kilometers from the City).