Not everyone experiences motion sickness, or to the same degree. I don't think there's much you can do if you're one of the unlucky ones.

On the bright side, you're less likely to die of poisoning!

That affects most people but trains tend to be different, especially if you are facing forwards.

If you can prop an arm up, many people have less motion sickness if they aren't looking down.

Same as you. The rare times I have to ride something, I go the audiobooks route.