So far, I've purchased a few things in preparation. LED recessed (pot) lights, which set me back a pretty penny up front but will hopefully pay themselves off by saving electricity. I still need a couple of flush-mount light fixtures and a couple of pendants for over the desk area... am struggling with the decision of going whimsical (feminine) or something a little more classic (of course, the classic options I've selected are more expensive).
I'm also trying to decide if I need/want a fireplace. I can't get a gas or wood fireplace because I've maxed out on allowable natural gas usage in this house, and I don't have room for a real chimney. I did find a very nice electric fireplace, but I can't quite decide if it's necessary.
The most exciting find/purchase for me (which I suspect makes me an uber geek) has been the hardware for a legitimate secret door. This will be hidden amongst a wall of bookshelves... I can hardly wait to see it in place.
Am still stewing over colours. I'd made up my mind a long time ago, but now I'm questioning my earlier decisions. If I'm smart, I'll stick with the plans.