The Trucker's Hitch is actually a combination of knots designed to get some leverage into the hitch-tightening process. Tied well it can result in a very tight line.
Take a bight in the working end of the line and pass it back and behind the standing part ensuring that a small loop is formed (Fig 2). Pass the bight back across the front of the standing part and down through the aforementioned loop.
Take the working end of the line around or through a belaying point (a ground-based ring or bollard or simply a belaying point in the bed of a truck), pass it back through the bight originally created and pull tightly (Fig 5). Finish with two half hitches.