Apart from the obvious (accelerator, brake, clutch/gears, steering), which controls must you assign?

I mostly play LFS and GPL. In LFS, I assign the handbrake and pit limiter. In GPL I don't assign any other controls. This is because I have a gamepad, and can't keep HOTAS (so to speak) otherwise. But I know most of you have wheels.


P.S. I thought about posting this to the RSC forums, but couldn't find a general discussion among the 100+ forums they have. Go figure.