KXCam22 hit the nail on the head when he said"stand". As noted, most folks fear downhills, so sit down instead of standing up while going down hill. I, too, pull in the clutch, as I don't want the engine dictating my downhill speed.
One other note, your rear wheel is almost useless. Only your front wheel will slow your progress, but use it wisely, or you will end up on your head.
Rick