Put some grounded, covered outlets outside by the front and back doors. An outlet for a vacuum cleaner in the hallway saves time. Put any outlets for washer and dryer up where you can see them.

Label the circuit breakers.

Be very picky where you place your lightswitches ... really look at your front door. Pick the wall that will NOT be a focal point: i.e,, where you will have a bench with mirror, etc. Switches get in the way of decorating!

Be sure to have plenty of outlets in the kitchen area ... mixers, coffeemakers, etc.

Put can lights over bathtubs ..I love mine!

In addition to ReSquare's comments and code required items, consider
--A recessed/covered outlet on the fireplace mantle ...not where the plug would get in the way of putting something on the mantle in that location. Or put an outlet around the side of the mantle not readily visible.
--Picture outlets.
--Floor outlets in large rooms for more intimate seating.
--Outlet in mudroom or laundry room 4'-5' off floor for rechargeable sweeper vac, etc.
--If you have a porch or deck include a couple of exterior outlets one on the house and one on the perimeter of the deck for electric grill, water feature pump, lighting, etc..

Great advice from red square as usual.

Electrical codes will drive a lot of the design requirements. Your requirements for your equipment, appliances, fixtures and 'future' plans will fill out the rest.

Review the electrical layout prior to rough-in. After rough-in, walk the space and verify it's as designed and don't be afraid to make changes. It's simple and inexpensive to change the location of the boxes/wires at this stage but gets much more costly once the finish goes up.

Pay extra attention to AV requirements. Pretty much every TV requires coax and power. Consider adding a couple of quad receptacles in these locations to avoid power strip proliferation (tv+cable box+blue ray+dvd+cd+stereo receiver+sub woofer+ipod dock station+....). In our house, we have a TV in most every room (I know its sad). I located some of the receptacles higher up on the walls for wall mounted equipment. If you are doing a home theater system, then have the electrician pull wire for speakers and AV cables. You need insulated cables for speaker wire in ceilings and walls. Add receptacles to patch the equipment rather than running the wire directly between components.

With most everything going wireless, the need for cat5 cabling is almost extinct, but you may want to run some for the main items (main panel, cable modem, routers, printers, etc.).

Make sure you get 200 amp service for the residence and that the electrical panel is in a closet with plenty of room for expansion. I suggest at least 16 SF (4x4 sheet of plywood) for electrical panel, cable, tel, data, plus all of the add-ons ie sprinkler systems, landscape lighting, timers, etc. Ideally. build a closet with doors that open with plenty of clearances (code will provide minimum, but add more if you can). Do not finish the ceiling in the electrical closet for future work. If you do finish the basement, provide ceiling tiles in key locations so you can pull new wire if needed. As suggested, make sure panel is clearly marked. They actually have word templates now for printing circuit labels.

Folks often overlook basement and garage spaces, especially if unfinished but don't be shy about adding receptacles every 10' or on every wall.

Absolutely agree with TMK - make sure service is 200 amp. Will save down the road.

Think about the landing place for phones, tablets, etc and how they will be charged. Can you create a space that is out of sight for these items - some people create charging drawers if local code will allow you to install electrical in a drawer.

Think about the electrical for an island if you have one in the design. There are clever ways to hide the required receptacles in the island.

Think about how you can pull cables to places where you intend to locate TV's and make a separate place for all the boxes that is out of site. Radio frequency controls then control the units.

Thank you ALL for such great advice!!!!!