I just had my house completely rewired (electric) and while we were punching holes and pulling wire, I went in an ran 2 RG6 and 2 cat5e to a bunch of locations. RG6 and cat5e all come to a wiring location in the basement. I can run satellite and OTA over separate RG6 to each location. Any cat5e jack can be either network or voice, depending on where I patch it at the patch panel.
Could I have run more stuff or different stuff? Yeah, probably. But it's a ranch house with full basement and I can pretty easily add anything I want, anywhere I want.
Forget about getting too crazy with "future-proof". Right about teh time you're sitting there all fat, dumb, and happy 'cause you paid for and pulled cat6, they'll be running fiber in the home. Nothing is future-proof.
You CAN, however, make your future much easier by doing what was suggested earlier. Run smurf duct to any location that you can't easily get to later when it's walled up. Corrugated conduit. Amazing stuff. I'd run inch and a quarter or so if I was doing it.