DIY sofa table - a little table with electrical outlets behind your couch instead of a coffee table so you have more room and can easily plug in your electronics! (not as a sofa table, but have some other ideas for this ~J)
towel rods on the back of the door- great idea for a space saver. Just need to make sure there's a door stop so they don't hit the wall :) was thinking of wallpaper on the back of the door behind the towel rack
This wall-mounted media cabinet takes a new approach to the traditional “entertainment center.” It hangs on the wall, allowing you to mount your TV to it, and then keep small media components on the shelves below. Wires hide behind the back panel.
Side Mounted Birdhouse Plans With Side Entrance Hole Free Birdhouse Plans - 1 side entrance hole accommodates chickadees, wrens, nuthatch, & Downy woodpeckers. This site includes plans for others, too.