Hi Yvonne, here are some nice things that I liked in Prague (I hope I'm not too late with this):
-Petrin's hill (nice wiev)
-Charles bridge (you will go there anyway, without my recommendation)
-The big old castle
- Old graveyard for jewish people (but I wouldn't recommend the museum & the synagogues there; boring, boring, boring)
-etc

There are nice places to drink coffee&beer everywhere but the erasmus-friend of mine who i was visiting, said that if a beer costs more that 25 kc's, you will find cheaper places to drink it. In general the restaurants that are near the castle and Petrin's hill, are more expensive than the ones which are further. I hope this helped you at least a little bit.

btw, i read an article about a study of the public transport in some European cities, and Helsinki won Vienna!!! Hehee :) But unfortunately I don't remember which city has the best public transport, perhaps it is Munster...

Now I'm in a hurry again, bye

Eleni