This has been asked many times on this section and over on the Building A Home forum. You can search and find other helpful ideas.

Whether you use wireless or not is up to you. I have a mixture in my house. If you're still using cable or satellite TV, you probably want to run a good quality RG6.

The code provides minimal compliance. Mostly for safety (the code abhors extension cords). Some people like to have additional outlets than the two that are typically mandated. Some put one in a convenient place (eaves) for Christmas lights if that's your style.

I have an electrical outlet installed near the toilets if you plan on using the fancy bidet seats my wife likes.

While this isn't electrical, If you are going to have wall mount flat screens (like over a fire place). Make sure you have a stud DEAD CENTER where you want to hang it. Makes mount selection easier. You'll probably want AC power and the TV and possibly cat6 behind it. My wife detests cords showing.

Be aware that the NEC (National Electric Code) is the bare minimum allowed in most areas. You can never go below those codes and standards but can always go above the NEC with quality craftsmanship and materials. An example is some electricians will just backstabbed the wiring into outlets and switches (devices). this is not a good idea because if the device goes bad it will also knock power out to downstream devices. A better solution is each device should be pig tailed true series circurit according folded and neatly tucked into each box. Also by mixing outlets and light fixtures onto the same circurit breakers is not a good idea because if a outlet trips a circuit breaker from a over load your lights will lose power also.

Starting with a clean slate and building new is the time to consider upgrades like security systems, home automation and devices that use category 5 or 6 cables along with cable, satellite and cameras that uses the RG6 cables. Even though a security camera may be wireless it still needs power to operate that is why hardwired LAN (local area network) systems provide power, audio and video all in one cable.

If back up power from a generator is planned a ATS (automatic transfer switch) is needed. This prevents back feed to your grid tied utility electric meter and will automatically start and stop the generator when the utility electrical power stops and starts up again. Solar panels and wind power can charge a battery bank for Net Zero monthly billing and is an investment that pays for itself. And Net Metering where allowed lets you legally put electrical power back into the utility grid.

www.dbelectric.us

Some sort of interlock is required, but an automatic transfer switch is but one way to do it. There are manual transfer/interlock schemes as well. If you don't have an automatic starting generator, the ATS is kind of overkill. One advantage of a manual transfer switch is that you don't have to size the generator to the maximum load after the switch (the code assumes you're smart enough to load shed before connecting to the generator.

Of course, all that being said. I do have an ATS (and my generator starts automatically as well).