Oh well. You could always rubberband from everything in the "trash" pile to putting everything in the "keep" pile.
Or pick what to keep and/or discard based on some arbitary pattern. Like a hershey kisses manga. Every dialog bubble that doesn't have a cliche phrase in it, you keep the next item on the pile. Cliche line, you throw it away. Do that for everything which is not clothes or computer. (You will probably throw away like 60% of things, gauranteed.)
Get a manual. It's the best way to learn.
You're about to go to college and don't know how to drive? >_>