I'm a student moving to the Netherlands this fall, currently in the US. I need to move out of my current university in the next few weeks, and for the summer I'll be staying with a friend. Is there some service that would allow me to send a package to the Netherlands ahead of time, have it stored there, and pick it up once I arrive in the country after a few months?
I did some research and I found this company that provides a 'post bin / mail box' (postbus in Dutch) service. You will get a postal address to which you can send things.
It's not super cheap though, if you want to do this as cheaply as possible I would try to connect with someone in the Netherlands (online or through your study) and simply ask if you could send your things over. It's a bit risky but I'd say in 99% of the cases things like this simply work out nicely with Dutch people. =)