Recycled Book Stool/Table - How great would this be to make one of these with discarded books, put a glass top on it, and use it in a library. - I would have such a hard time ruining those books, but this is cool.
Alternative to couches-two twin beds that can swivel. Would love this in a game room. Great for sleepovers young and old DIY tutorial includes super easy design for headboard/back of couch! + 27 Ways To Rethink Your Bed
Easy DIY Magazine Display: uses clothes hangers mounted on a wall, easy to change regularly. More likely to get read than magazines stuffed in a rack! Maybe bridal/ dress mags near fitting room/waiting room.