I live 20 minutes from Amsterdam.  Amsterdam New York that is.  If you wanna go there you can crash at my house for 35 a night.  If you're talking about Amsterdam in Europe, which is most likely the case, I'd start by either using search engines like travelocity/expedia etc just to get a rough price on the going rate and then also look into hostels, which in Europe tend to be cheap and nice (experience from France)