This post is one of my favorites because I, myself, own a smaller home. At 1,100 square feet, I need to utilize every space perfectly and stay organized to prevent clutter. This post has wonderful ideas on how to utilize space that you may not even know you have. Under bed storage, shelving and built-ins will all make their appearance.
http://www.hgtv.com/design/decorating/design-101/small-space-decorating-donts-pictures