This may sound daft, Red 3, but you may want to invest in a free-spinning barstool-type chair. With one of these conveniently located in your place of residence, you can spend a few minutes every day rotating yourself in it. Once you've given your semi-circular canals a good beating in the yaw-axis, you can repeat the same regimen while tilting your head up and down and side-to-side to induce multi-axis coupling.
I used to get a lot of mileage out of this as a parlor trick, due to the fact that several attacks of labyrinthitis I'd had as a pre-schooler had almost completely burned out the nerves in my semi-circular canals. As a result, it's left me entirely immune to motion sickness, even under the most trying of conditions — the only "down" side of this condition is that my balance lacks any vestige of fine-tuning. I could literally do aerobatics, spins and UA's until the fuel ran out, even when "non-current".
You can similarly "deaden" your inner ears by using the spinning chair technique described previously, or achieve the same result by having an otolaryngologist (ear/nose/throat specialist) introduce a small amount of streptomycin into your labyrinths.
[This message has been edited by Constable Clipcock (edited 10 February 2001).]