Cheap accomodation search for all you travellers!!?

I am thinking of spending a couple of nights in amsterdam next may and then flying to geneva for four nights. can anybody recommend any cheap but pleasant accomodation in either place? if recommendations are from personal experience, all the better. cheers!
Answer
Brians hostel in amsterdam is really cheap and not that bad either. nice staff and free breakfast. but wot do i no i was twatted 24/7 wen i was there! !