Chair: yes but doesn’t need to be expensive. I’m still dragging around an office chair from 2002. It just fits me.
Separate your space. Make sure your work and home environments don’t collide. Once I learned this lesson, I bought a used RV and converted it. Power, A/C, fridge - just plug into the house and you’re good. Once the rats infested it and got me sick over and over, I switched to a Lowe’s Garden Shed. Now, replete with a basic folding table and all my stuff.
Synergy. One mouse & keyboard + clipboard, shared across all machines. From left to right, I have a personal intel NUC, work MBP intel, work MBP m1, personal MBP m1. Each with an extra monitor positioned above the machine. So effectively it’s like a single giant machine but workloads can be isolated. So nice. Game changing.
All y’all with your special mics - stop it. They suck for us on the other side of the call. Just get a set of headphones with a mic built-in. Beats, AirPods, etc. y’all with your fancy mics have no idea how inconsistent and awful they are for us on the other end. I lose at least 10-20m of my week with people futzing around with their fancy mic. Stop it.
Again, separation of work space vs living space is paramount. You can poison your living space with all the positive and negative of work - it’s just hard to really let that stuff go without physically changing your environment. Polluting your living space with work will only work for so long.
Other than that, I wish I could express how rudimentary you can go and get yourself a really good and productive space.
FWIW, my keyboard is an old Dell, circa 2005 - still rockin - mouse, old Logitech (2007?). Desk is srsly just a jank folding table.
It’s definitely less about the toys you buy than the protection of your work space vs living space - and making sure your just plain comfy sitting for hours on end as you forget to take a break.