Although English is well spoken in the Netherlands, it will serve you to know (some) Dutch. Here are some options to get to know the Dutch language.
Dutch Language Café The Hague
Dutch language courses
First: check your university if they offer any language courses for international students. Most of them have. If not, you can find some here:
Especially for students, located in the heart of The Hague in Haagse Bluf.
Based in The Hague. These Dutch courses are all about interaction and practicing your Dutch in real life.
Lessons on all levels, located in The Hague
Learn to speak, write and understand basic Dutch, with this free, three-week, introductory foreign language course.
ROC Mondriaan College
Only for habitants of the European Union and Turkey. Costs are low.
Volksuniversiteit Den Haag
Learning the everyday language, the Dutch culture and the Dutch way of life.