Replace the whole light. I went through the stages: Replaced the bulb with a silverstar, some improvement, but not much. Then I took it out and cleaned the reflector, some more improvement. Then I just went and got a Silverstar 6014 sealed beam. More light, better pattern of light and lower amperage draw.
The new sealed beam will just go right in to the original, same plug, same mount, Boom, you are done.
Only thing is not legal in U.K. due to the lens pattern is designed for driving on the right side of the road.