There's a thread around here about the TDD mod...
If you're too lazy to search, here is the short version. If you look at your gas pedal, towards the top, you'll see where the throttle cable connects to the pedal assembly. You'll notice that the cable isn't directly connected, but is connected through a spring. The spring is there to dampen vibrations from the engine to the pedal. When you press the pedal, you'll notice that the spring compresses a good amount before the cable even begins to move. You'll also notice that the relationship between the cable moving and the pedal moving is non-linear which makes throttle control really vague.
All you have to do, is use something like a zip tie to wrap around the spring to keep it from compressing. This will make a solid connection and 100 times better throttle feel/response.
hope that helps