Does anyone have any travel tips for Europe?

I am a regular American planning a trip to Europe with my brother. It will probably be a two week affair. I am looking for any tips that people might have onwhat to bring and how to \"backpack\" across europe as well as places to stay and monetary advice. I am a college student with limited cash flow and any advice on how to skrimp and save would be great, as well as locations that would be good to travel to.
________________
market samurai ~ marketsamurai ~ marketsamurai.com

Be sure not to miss Amsterdam. Lots of cheap hostels to stay in Warmoestraat, right in the centre of town and on the edge of the red light district. You can also take the train from Amsterdam to Paris or Brussels if you fancied it.