Firstly, I don't use any desk. I find them distracting. My 2015 Macbook Retina Pro and two Dell U2913WM 29" monitors are suspended from the ceiling using a pulley system. This way I can perfectly adjust the pitch and yaw of the screen as well as its vertical and horizontal distance to find the optimal point.

For a while I also was suspending myself in order to relieve tension on my back but I found it was a bit of hassle getting in and out of the harness so instead I use a stair-stepping machine as my "chair." It keeps me active and gets the blood flowing.

My "keyboard": I use two ergonomic chorded keyers as these give me amazing wrist flexibility. It took me a while to adjust but now I'm averaging around 150 WPM with them. I custom built my own sensor rig so I could do gesturing with them as well - was a pain, but worth it. And since the use case is limited to me, I was able to make things easier but just having it detect a certain color blob (in this case, bright hot pink) which is the color of the coding gloves I wear. Insane accuracy with that setup. I got emacs to play nice with the gesture control too so running a macro is literally as easy as a handwave.

I do enjoy listening to music while I work. I have a wireless headphone setup which syncs with my EKG readout to automatically determine the kind of mood I am and what music would work best for my mental space. I don't use spotify, I've built my own streaming service which pulls from my arch media server at home so I can listen to everything in FLAC. Mostly a mix of live Grateful Dead shows from 70-74 but also remixes of bird songs, free jazz, and intelligence-boosting drone tapes.

I work 20 hours a day, usually from 6:30pm to 2pm. I use melanin and mugwort to regulate my sleeping cycles so although I only get around 4 hours of sleep, it's always deep REM so I wake up feeling refreshed and ready to crush code.