A couple of things - if you have a fireplace with a mantle, make sure they install an electrical outlet in the center and just above the mantle. You'll use it a lot!
Also, if you do outdoor lighting during holidays, it would be wise to install outdoor electrical outlets either under or over each window.
Have cabinet makers install turntables in all corner cabinets - saves you from having to dig in the back corner where you can't see.
Consider installing lighting under cabinets in the kitchen. Also, add extra electrical outlets around kitchen counters - about every two to three feet.
Have outlets installed under every window inside your home, as well as about every four feet in living and bedrooms.
Consider using pocket doors for closets - and have shelving and shoe racks built into closets. Also, put lighting in all your closets, with the switches just inside the door - or you can have the light automatically come on when the door is opened.
Put hose bibs on both ends of your home. Consider hot and cold taps at the end you use most.
Consider "warm air" heat pump (about a ton larger than your square footage calls for) with atached humidifier - feels really good and electric seems to be the least expensive fuel, at least for now.
Consider installing decorative towel bars behind bedroom and den doors or in walk-in closets for a handy place to store extra blankets.
Hope these hints help... If I think of any more, I'll post for you. I used to work for a builder and got these ideas from customers. Also, keep an eye on your builder and the progress of your house, daily, if possible. You'll catch lots of mistakes if you do!
Good Luck!