So here are a few reviews:

I got used Aeron chair (the thing lasts forever, unlike other chairs I had that seemed to last 6 months on average), 30" (2560x1600) monitor, Microsoft Natural Ergonomic Keyboard 4000 (which I use with Dvorak layout), and all of that was some of the best money I've ever spent. I also get the largest desk I could fit in my place, and I still regret that I couldn't get anything bigger. These are awesome ideas.

I tried many memory foam pillows, and they are a bit better than "normal" pillows, but I haven't been terribly happy about any of them. I always sleep on my side (I'm literally unable to sleep in any other position, no matter how tired, how the hell people sleep in airplanes or trains is a mystery to me) - people who sleep on their backs have very different pillow needs, so if you hear recommendation from someone who sleeps differently, disregard it completely.

Unless you're running a lot, and virtually nobody does, "barefoot shoes" seem entirely pointless, and their main effect will be marking you as a total nerd publicly.

Fidgeters are much less likely to be obese than non-fidgeters.

Correlation called, it wants its causation back.

Also if you're looking for low hanging fruit, even very modest amount (1-3h weekly) of light to moderate physical exercise does wonders to energy levels and general mood. inb4 anybody asks it's been proven in every study imaginable to have zero effect on weight either way.

Second also: Ninja Zemgears seem to have highly polarized reviews online - some people's feet fit well and they're happy, other people's feet don't and they hate them. This problem probably applies to all "barefoot" shoes, since they need tighter tolerances than traditional shoes, and traditional shoes already have fitting problems with plenty of people, so people usually buy them in person than online. Also plenty of people complain about durability.