very very handy
Find Hostels and hotels in Europe
http://www.reservations.bookhostels.com/lonelyplanet.com/
Train ticket prices in Europe
http://www.railkey.com/tickets/
Skyscanner – find flights in Europe
http://www.skyscanner.net/
Czech trains – IDOS – timetables and bookings
http://www.vlak.cz/ConnForm.asp?tt=c&cl=E5
Europe train times – via a German site – VERY GOOD!
http://fahrplan.oebb.at/bin/oebb.w02/query.exe/en