When you start living in The Netherlands you are likely to have many doubts about bureaucracy, finding a house, health care insurance, schools, etc. My case was not different: I have spent hundreds of hours looking for the information that I needed. I have now a good compilation of links that I would like to share with you :).
I have seen that ESTEC is not of much help in this for partners. I think their employees are well advised but their partners have different issues in some aspects and there is no centralized point where you can find this kind of help. Of course, you can also ask workmates because in a full-of-expats organization it is easy to get some clues. I hope this lack will be solved soon. I leave here my suggestion :D.
There are many guides on internet to help you with your first steps in Holland. Some of those which I find with quite complete information are in the next webs: XPat Media, ACCESS, I am Expat, Expatica.com and in Just Landed between others.
The most complete guide for expats that I have found is “Holland Handbook“. It is a very good compilation of information, tips, explanation about Dutch culture, interesting references and it is regularly updated (every year, I think). You can buy the book in many bookshops in Holland or on internet. I have also bought the iPad app of this guide and, in my opinion, it is really useful and very well done.
Finally, I would like to recommend two fairs for expats in Holland: “I am not a Tourist” Fair, organized by Expatica.com in Amsterdam, and “Feel at Home in The Hague” Fair, organized by TheHagueOnLine. Both are a good opportunity to know many kinds of companies offering services/products interesting for expats.