My memory foam matress, which isn't very old and wasn't very expensive, is sagging in the center. My nights are spent stuck in a pit, with my butt sinking and my shoulders pushed forward. During the day, my posture is horrible and I can't straighten myself out.
So, while reading minimalist sites, one thing led to another and I stumbled across floor sleeping, aka paleo sleeping. Minimal padding, on a floor or hard surface. Supposedly grounds you as well and does wonders for your back and posture. So I thought, why not? My first night or two weren't very comfortable but I felt great when I woke up. My main problem is the cold right now. Sleeping on a heated blanket/mat would be nice, but then I'm being exposed to all of that. Now the firm surface doesn't bother me at all. And I'm not slumped over in the car anymore (have had to adjust my rear view mirror too!)
Here's a link: https://www.youtube.com/watch?v=BMNgSDEwp24

