Sleep on the Water
Good and cheap accommodation in Prague are the botels, they are boats on the river, next to all attractions.
I stayed at the Botel Albatross once, other ones are the Vodnik and Admiral.
You should not stay in a botel if you get dizzy easily. When you look out of the window and right onto the water it can happen that you feel like in a passing train, the water racing, or you racing LOL But you get used to it.
Botels are also quiet places, thus great for a good nights sleep.
Some links:
http://www.hotelstreet.co.uk/Hotels-4330-Botel_Albatross.html
http://www.prag-hotel.cz/prag-botel-vodnik.asp
http://de.venere.com/hotel_prag/smichov/hotel_admiral_botel.html
http://www.admiral-botel.cz/
http://www.tripadvisor.com/ShowUserReviews-g274707-d277483-r15503688-Botel_Racek_Praha-Prague_Bohemia.html
For more just google Prague, Praha or Prag + Botel





