Use low gears. Generally the same one you used to ascend. Never ride your brakes. Slow down using your brakes and transmission to 15 to 20 mph below what you consider safe. Don’t use any brakes until you reach a speed just over what you consider safe. Pull off and let the brakes cool anytime you believe necessary. It is not a race. Learn to enjoy descending. Ignore those behind you until you can safely pull over.