You will need speaker wiring going from wherever the AVR will be to all the speaker locations.
You will need a cable feeding the video signal from the AVR to the video display (TV or projector).
If any of your source components require an internet connection, you will need a CAT5 or 6 cable run from the modem to the source component.
If any source component requires a signal from an outboard antenna, such as a satellite receiver or TIVO DVR, you will need coaxial cable (preferably RG6) from the antenna to the component.
Some satellite receiver also require a land line phone connection, so you will need to run a phone cable for that.
That should cover it.
Regards,
Wayne A. Pflughaupt