As long as your bringing up MacGyver, Victorinox "Tinker" Swiss Army knife. Duct tape to put things together, knife to take 'em apart. The Tinker is small enough for every day pocket-ability but versatile enough to do about anything you need.
Although I don't have a Swiss Army knife myself, a buddy swears by it. He even breaks it out when we're just grabbing a bite to eat. Other restaurant patrons always cast sideways glances at him, but hey, at least he's able to open his bottle of beer. ;)
