I bought a shelf stereo system and keep it turned on at low volume while I work, and it's nice to randomly hear an old song I like, or a new song I like. Local FM is handy during emergencies here too, and it even seems like about 1/4 of the ads are PSAs or local announcements from NPOs, government agencies with helpful info, etc.

I also bought a scanner radio and enjoy listening to local radio traffic on breaks.

I bought some desk mats that I like, and I prefer looking at them rather than my desktop, which is an old banquet table from 2000 (newer tempered glass desk is too cold in the winter).

Regarding stationery, I picked up some horizontal shelving for pens and pencils, and bought a bunch of fountain pens, watercolor pencils, highlighters, and so on...a lot of fun for doodling on those long calls.

Finally I bought an /r/cheapkeys keyboard, then another...anyway, long story short I learned some basic chord progressions for jamming purposes, and now I have a keyboard collection. It's been a lot of fun. (I learned the keyboard solo from "All of My Love" by Led Zeppelin and I swear it was one of the highlights of 2020, amidst all the darkness)

Anyway I'm a bit weird in that I find that enjoyable interests and values-based living is where productivity goes to recuperate and regroup before reaching higher highs. Good luck to you.