Though no home-wiring solution has established itself as the clear industry leader, most new construction is using Cat-5 and RG-6 in a “home run” or “star” configuration, with all the wiring radiating out from a central hub to service individual rooms. The Home Automation & Networking Association recommends installing two Cat-5 cables and two RG-6 quad-shielded cables into a universal-service outlet in each room served.
For clients with children who desire plenty of computer time for schoolwork, access to the Internet, television and maybe shared printers, go for two Cat-5s and two RG-6s in all habitable rooms. If a client prefers moderate connectivity, one good connection in the kitchen or home office will do, in which case HANA suggests one Cat-5 and one RG-6 as a minimum standard.
Be sure your estimate allows for punching a few holes and doing a neat patch job. Surface-mounted wiring does not look good, and the exposed cabling will serve as a constant reminder of your “professional” workmanship.