Best thing to do is look at each room and decide what you want to do in each room, then we can help with the cabling
For example
Master Bedroom - internet /network, phone, TV(satellite, cable or terrestrial) and music
Lounge - Multimedia (including TV, watching films and music), network and phone.
Post your results here and then we can tell you what your cabling options could be. Also look at these links
http://www.automatedhome.co.uk/Conte...ing-Guide.html
http://www.swhowto.com/index.htm
Oh and remember its not just about what you want now but what you may want in the future.