Hit Amsterdam.
There is a room above the "Blue Velvet" that you can rent out for 50 euro a night. It's also just a couple blocks from the Centrum, from the Centrum it's only a 20-30min train ride into Rotterdam.
Once you hit Rotterdam, make your way to Europort, watch some of the coal ships unload and get some cool pics of the Windmills.
Thank me later.
EDIT: Even better- Book a trip from Europort aboard the "Pride of Hull" it's a P&O ferry and it's kinda luxurious.
One way on a non weekend can be as little as $120 US, and you get a nice cabin with a stand up shower.
It's an overnight ride, but I sat on the deck of the ship the morning before we arrived and watched the sunrise over the northsea. It changed my life.
Once you get to Hull, go downtown and check out the gothic churches. There is also a bar there commonly referred to as "Nelly's", it's been there since forever and a day. So old that they never installed electricity and it's all still gas lighting and the original furniture.
Hang out there and have a pint of bitter.