[the head]

I guess it depends on how radical you want to be with the aerodynamics. I fold my mirrors in but that's the extent of what I do. After that I think you could remove the mirrors, remove the antenna, remove the windshield wipers, and tape up the grille opening. It might help some if you did a lot of little things but (to me) it would look a little funny.

Weight over the wheels would help with traction but will also slow you down as a result of having to pull the weight. Right now I don't have much of a traction issue. There are stickier tires out there that would be a better solution since they don't add weight.