when working with a builder - asks if he includes things like shower rods, mirrors, towel rods, tp holders, etc... (ours didn't) had to send DH over to put up a shower rod the day before we moved in - we didn't put up the TP holders for like a month - yes, after dropping 2 or 3 rolls of TP into the toilet! heheh
OUTLET placement...I'm still cursing the placement of our lightswitches/outlets in our bathrooms...when I dry my hair, the hairdryer cord hangs in the sink - ugh!
also - if you plan on having a garage door opener - make sure outlets are put up there near where it will go.
SCREENS! we closed in the winter, so our builder didn't put the screens on the windows (he left them in the garage)...make sure they are all there and accounted for before leaving.
I think someone might have mentioned this - but our builder did this for us w/o us asking...all the rooms that have overhead lighting also have the "braces" set up in the ceiling in case we ever wanted to put in a ceiling fan.
one more thing on lights - our builder gave us an $800 allotment for our lights. We took that amount as a credit to our house and went out and bought our lights ourselves. Better then having the builder put that brass stuff everywhere - we wanted pewter/silver finished lights. (Using a Lowes 10% coupon - we saved alot of money and were able to get nicer lights then the builder would have bought) Lowe's actually has a REALLY good selection of lights.