I paid a guy a bit under $200 to pull Ethernet cables from my basement up to the attic of my house. Now I can keep heat-generating stuff like my storage server and the cable modem (surprisingly heat-intensive) in the basement, have a WiFi AP in the attic for great coverage in the yard, and I can easily drop lines down into rooms on the 2nd floor from above by just drilling a small hole in the top of a wall and feedin…
As a bonus, if I (or the next guy) wanted to have a landline phone, it's in the same closet and it can be patched to anywhere in the house by swapping a single wire.
Given the opportunity, even after the house is complete, it's a very useful thing to do.