What kind of receiver do you have? You may be able to minimize the number of long cables by wiring everything to your receiver, and then only one or two cables from the receiver to your television.
If all your equipment has HDMI output, and your receiver can switch HDMI (most new ones do), you could all your equipment to the receiver's HDMI inputs, and run a single long HDMI cable from your receiver's HDMI output to your television's HDMI input.
If you have a mix of HDMI and analog equipment and your receiver can convert analog to digital (as far as I know only the Denon AVR988 and Yamaha HTR6190 do), you can connect everything to the receiver's various inputs, and you still only need to run a single long HDMI cable from your receiver's HDMI output to your television's HDMI input.
If you have a mix of HDMI and component-video equipment but your receiver doesn't convert analog to HDMI, you have two options: run both HDMI and component cables to your television, or skip the HDMI and use component for everything. If you want to try using just component, you can connect everything to the receiver's component inputs, and run a single long component cable from your receiver's component output to your television's component input. Otherwise you'll need both types of cables.
WARNING: Long component cables can degrade image quality, so for component cables, use the shortest length and highest quality cable you can! HDMI cables tend to be built to more consistent standards, so you can probably get away without using a premium brand of HDMI cable.
If you have a home-theater-in-a-box with build-in dvd player, it probably won't switch video for you like a proper receiver. In this case, you are out of luck, you'll have to run an individual cable for everything to the television.
