Previous post was recommended a number of online website to buy cheap air tickets, then I will provide some website that can online booking some very cheap hotels/hostel. The hotels/hostel is related to you that can provide a good place to get the good rest or not, only have a good rest that you have enough energy to play and enjoy your trip. There are some hotels/hostel online booking site：
Venere.com Tens of thousands of middle and low hotel, a lot of 40 Euro / double room, booking free of charge and cancellation(except for individual)
※ Booking.com Established in 1996, Booking.com is one of the world's leading online hotel reservations agencies by room nights sold, attracting over 30 million unique visitors each month via the Internet from both leisure and business markets worldwide. Booking.com offers many types of property, ranging from small independent hotels to a five star luxury through Booking.com. The Booking.com website is available in 41 languages and offers over 120,000 hotels in 99 countries. Free booking, free cancellation(except for individual)
Booking.com is based in Amsterdam (Netherlands) and is supported internationally from offices in Amsterdam, Athens, Barcelona, Berlin, Buenos Aires, Cambridge, Cape Town, Dubai, Dublin, Grand Rapids, Istanbul, London, Loulé, Lyon, Madrid, Montréal, Moscow, Munich, New York, Orlando, Paris, Rome, San Francisco, São Paulo, Shanghai, Singapore, Stockholm, Sydney, Tokyo, Vienna, Warsaw and Zürich.
Hostelworld.com The largest and cheapest hotels network. Prices as low as 10 Euro / bed / night.
HRS More than 250,000 hotels worldwide, in real time the best prices, prospects are paid; free reservations, cancel.