How do you warm up your home?

So my sister is building her first house in College Station, TX. Yeah!! (This picture has the same elevation her house will have). Since it's her first home she doesn't have a lot of furniture or decor so I've been giving her my advice on how to "warm" up her house. I think that the cheapest and easiest way to warm up a house is with wall color, greenery, and rugs. What do you think?
Comments
Michalann
Check out Design Star on Hgtv. Really good decorating tips. (of course, I know that you are the queen! :)