So, I've been thinking, and I realize that a lot of people with motion sickness may not have the easy solutions us PC gamers have (FOV, head bob, potential mods, yada yada yada). Which, while not "unfair" by any means (there's nobody to blame), sucks and is not an ideal solution.
So, a few things that I know have helped myself and others in the past (this is for console gamers):
1. Put an adhesive dot on the screen. I believe this was mentioned in the article Sard linked early on, but it bears repeating. It should be roughly dead center. When you feel yourself "slipping," so to speak, focus on that. May not help everyone. But I've never tried.
2. Open the blinds, make the room as well-lit as it possibly can be. The darker a room, the more claustrophobic you feel, the less peripheral vision you have, which makes it harder for your brain to register whats going on. When your eyes can quickly skirt side to side to see what's going on in a well-lit area, you are able to get your bearings.
3. Immersion treatment. This will not work for everybody (myself), but I Feel like a lot of people haven't even tried, probably because they generally don't care for FPP games. So, try it. Play as long as you can before the nausea JUST starts to set in... do not push it. Then stop. Come back in 2 hours, or less (or more).
Try again. Repeat. Keep doing this, maybe a couple times a day. I know, its a lot of hassle, but just remember - nobody owes you (And I mean this in the best way possible) TPP, or any perspective, for any game. It is 100% on you to deal with your condition, as much as that sucks. The devs will surely do what they can, but they are limited by technology and design.
4. Dramamine helps, based on personal experience. I've heard people say "I shouldn't have to pop pills to play games!" and you're right. But again, you are the person wanting to play the game, so it is on you to find a way to make that happen. Plus, Dramamine is not a permanent solution. Apparently, a lot of people need only use it for a little while until their body becomes used to FPP.
5. Put lots of sh*t near your TV. Not much to say here. The more "safe" things you can focus on when too much action is happening on screen, the better.