Three columns, now for the margins

Well, obviously I got the three column bit worked out. Now I just have to figure out what part of the margins are screwing up. Why the hell are the links hitting the extreme left edge of the screen? Supposed to have 20px margins, but that ain't the case. Oh well, maybe I'll get hit with another epiphany that stops my mind-numbing data entry here at the hospital dead in its tracks. Here's to hoping.