Without any motion at all, you just kind of get use to it. If the physics of the sim are really good, it kind of fools you a little. But I was never able to compensate for it in any way (PCars, Asetto, RFactor2, GTR2, etc)
A buddy of mine has one of the cheaper motion rigs. Once that was dialed in, it really helps a LOT. Otherwise you're limited to bass transducers to add in vibration for tactile feedback. That definitely helps along with decent physics in the simulation.
Mahjik has more experience in the sims than I do and far more seat time. I'm sure he has some ideas.