How can I achieve a "Tech Guy" look/style (see details...)

So, a buddy of mine “nominated” me to play the part of “Tech Guy” in a sizzle reel for a ghost-hunting show. I’m the tech guy, because, well…. I like tech. The guy who’s arranging it wants me to look the part. He suggested wearing a pair of glasses, but I lost them. I’m trying to brainstorm over here, but besides taping a cellphone to my forehead, I can’t think of a damn thing. Right now I’m rocking the depressed, too skinny, and sleep-deprived look.) Any suggestions?