My fiance lives in Holland (born in Amsterdam) so I'm there about every third month or so. You've been given great advice so far, you don't need to bring Euros, just us an ATM at Schipol.
Since I'm american, and don't get the 54 vacation days off a year that my fiance does, I try to get the most bang for my buck on any trip. I'd recommend going (by train): to Brugges or Antwerp in Belgium, in Holland: Utrect for shopping, Den Hague, and of course I'm partial to where my fiance lives which is Gouda (yes like the cheese but pronounced How-da)which is a great little city. When you're in Holland, make sure you try Poffitjes - little tiny pancakes covered in powdered sugar and butter, YUM! and Stroofwafels-little wafels with syrup in them baked fresh, you buy them off the street.

Enjoy your trip!