What wiring decisions do you wish you made when building a house?

I’m building a house and will have ample opportunity to walk with the builder to specify outlets, cat 6, and coax runs and locations. What sorts of little things do you wish you had done in your house or would be useful?

I plan to run cat 6 from mostly every room (some in multiple locations) to the office where my servers will be. I will also be running a few runs of cat 6 out to the shop for future connectivity out there. Anything else that might be useful?