Learn to read a schematic! Schematics are our map to designing, building, and troubleshooting circuits. Understanding how to read and follow schematics is an important skill for any electronics engineer.
Wall mounted PC http://www.overclock.net/t/1467135/wall-mounted-water-cooled-pc-the-recoilmachine
http://www.talkingelectronics.com/projects/100 IC Circuits/1-100_IC-Ccts.html
Op. Amp. Reference Cannot remember where I picked this up, but have used it hundreds of times since.