Ethernet connection, phone connection and cable outlet in every room. Two cables in places were you would want to put a TV (living room wall, kitchen area, etc.)
In the office, put multiple 2 gang outlets (4 total plugs) all on DIFFERENT circuits. A place for all the modems, routers, wireless things, with Ethernet connectionS (like 2-4) near it. With computers, monitors, routers and such, you can overdraw power in the office.
Single box with all phone, ethernet, cable connections. We have it in our guest closet. Can easily route internet to all rooms, cable/sat/antenna connections to the cable outlets in each room, etc.
Eave plugs. Outlets on the underside of your eaves. Allows you to plug in christmas lights that are all controlled from a switch in the entryway. Did this for several houses when I worked as an electrician. No more running of extension cords around the house and can change out the simple switch for a timer switch later so lights come on/off without you actually remembering.
Tubes in the wall for the phone/cable/ethernet connections. Allows you to later pull cables if a new technology comes (fiber lines, etc.) Essentially a plastic flexible tube.
Sink in the laundry room.
3rd car bay in garage. Back door in garage so you can change out air quickly inside garage (i can do this; essentially have a wind tunnel with one garage door open and the back door open. Useful when painting/staining wood).
Extra outlets/circuits in the garage for tools/woodworking/etc. At least one plug near the garage door, so you can plug in leaf blower/shop vac.
3-4 individual circuits for kitchen, besides appliances. Microwave on own circuit (I hate above stove ones, so mine is countertop), coffee pot, mixer, blender, etc. If my wife turns on the microwave and her one-cup coffee thing, it pops the circuit.
Gas everything. Tankless water heater.
Spray foam insulation. Not a fan of the radiant barrier, as that kills radio waves in the house (I refuse to pay for TV, so need TV antenna. Foil in attic = no TV signal. Also, radio is hard to pick up sometimes)
6" exterior walls (5.5" actually) instead of the 4" (3.5" actually) walls. More insulation. Essentially use a 2x6 for the walls instead of a 2x4.
Multiple lights/LED lighting in the attic area. Convert from the required one fixture (with one 100W bulb) to 6-8 fixtures (if going with a single bulb) or two to four 2-4 foot fluorescent fixtures.
Under counter lighting. Get LED lighting or wires to a switch for something.
Silestone (or equivalent) for counters. Looks like marble, but no issues with hot/cold, no cleaning/sealing issues. Essentially polished concrete (but decorative!). Can put pots straight from the stove on the surface and not mess it up.
If you want the SS look, make sure the fridge is magnetic. If not, none of your magnets will work on the fridge. Same goes for dishwasher (aunt (and others) have a magnet for the dishwasher if it is clean/dirty)
DO THIS REGARDLESS:
Minimum 12 AWG for all electrical lines. Do not let them put 14 AWG in the house. You will thank me later.
Those are all I can think of. Some I have in my current house and I like it. Others are what I wish it had.
~egon