Well, I guess these count.
First set of pics is my cooling solution for my nVIdia GeForce MX 420, which I was worried would overheat from OC'ing. The fan is the cooling fan from a dead i486 DX2, and I still had the mounting screws. I connected it directly to a molex, by shoving paperclips in it!
It works fine, and my PSU hasn't exploded.
The wires are connected by twisting the metal together, and then cellotaping it. It works.
That took about 10 minutes to make.
Next piece of work is my laptop stand: It is made from a paper binder book, with slots cut out for the fan and hard drive airflow. It raises the screen about 1 1/2 inches, and puts the keyboard at a nice angle. Five minutes of finding the book and then cutting it up, and my laptop is cooler than ever!