If you re going just a few feet from a wall mounted tv to a lower entertainment center for example it should be easy to fish the wire down.
Home run in wall panel.
The main component in a home run wiring scheme is the central distribution point which depending on the type and size of network can be a router hub or structured network panel snp.
Structured wiring begins with a structured networking panel snp which accepts cables from outside providers and distributes the signals directly to each room in your home.
Put it in now preferably during build stage so low voltage conduit can be run in the walls to each media outlet location and easily replace the media wiring and or related central distribution components as technology changes run cat5e now but when you need fiber run several years down the road it s very easy to do with smc infrastructure in place.
Try to detect which way joists run and where empty wall space between studs might be.
Explore your crawlspace or ceiling in an unfinished segment of your basement.
By inspecting from your crawlspace or attic you can identify which wall locations do not carry water pipes and electrical wires.
This point will be connected to the world by service from an outside service provider and should be able to handle large data bandwidths.
At this point you can run your cables through the wall.