norwayjose
Aeron chair - I bought this in 1999 and it's been much more comfortable than any chair I've used at any office I've ever worked in.

4k monitor - Picked this up on a Black Friday sale 1.5 years ago. It's much easier on my eyes than the HD monitor my company provides in the office.

KVM - Allows me to switch between my work laptop and some of the higher end embedded machines I work with. I end up needing to swap cables at work.

swatcoder
A private office away from my actual home.

I've been remote for most of my career and keeping an physically distinct office/workshop has demonstrated a very high ROI both financially and pyschologically.

It's the best of both worlds: mental separation of work and play/rest; rent that's cheaper per sqft than residential space; work in "town" with home that's quietly removed; a practical workshop with a simpler aesthetic at home; and still no on-site colleagues, cubes, open offices, drama, etc

nicbou
Switching everything to USB-C. It makes everything much simpler, especially when backpacking. Everything charges everything using the same cables. At last I also found a USB-C shaver (from Manscaped).

That aside, the desk on my balcony. I loooove working outdoors among my plants and hearing birds sing.

I also got my money's worth with Airpod Pros. I carry them almost everywhere. They're great when working in coffee shops and noisy environments.

kingkongjaffa
I’ve been a remote worker since September 2019.

Sit stand desk - help avoid being sedentary as a remote worker, an electronic one with preset heights.

Herman miller chair - i got mine used for £400, 5 years ago, still perfect.

Keychron keyboard - might as well take advantage of having no coworkers and got full thoccy keyboard. Click clack.

Lots of notebooks - leuchtturm1917 brand.

A standing or wall mounted whiteboard - I draw a 3x3 grid on mine and each square can get a postit note to help me task manage in my physical space.

A USB powered desk light - i put this on to improve the lighting and for video calls, mine is temperature adjustable from cool to warm.

Sharpies / pens / copic markers - even in tech don’t underestimate the power of creating things in physical space. Sometimes I go straight to code or figma, other times my process starts on paper.

nickfromseattle
Walking pad so you can walk while you work. Helps minimize negative health impact of working too much.
jmercouris
A large format keyboard/mouse pad (it fits both). It has changed how I use my desktop. Before my mouse pad would slide around, now it is a non issue.
sbolt
I bought a BenQ desk lamp that sits on my monitor a few years back and have loved it since. Lights up my whole desk evenly and is out of the way. https://www.benq.com/en-us/lighting/monitor-light/screenbar-...
keiferski
Multiple monitors. Every time I'm away from my 3-monitor set up, I feel vastly less productive for most (but not all) tasks.
wannabebarista
Logitech M500S corded mouse. I've been using some version of this mouse since 2002, and it fits better than any other I've tired. Plus it's around $30.

Steelcase Think chair. I used this chair in my work office and couldn't find another chair that worked for me at home long term.

freedomben
Without a doubt, the UHK (Ultimate Hacking Keyboard). It changed (for the better) the way I use my desktop. I even ended up buying a travel case for it so I can take it on business trips where I will do a lot of keyboarding. By far my favorite home office purchase.
olegious
One thing I haven't seen mentioned- a wall mounted monitor arm. I use an adjustable sit/stand desk and hated even the minor vibrations produced by my typing, attaching my monitor to a wall mounted arm eliminated this issue.
softwaredoug
The Magic Keyboard with touch-id probably saves countless amount of time with authentication.
mydriasis
Kensington slimblade trackball. Very configurable ( though on Linux you'll need to write some config files ) and very attractive. Has been very OK ergonomically.
ssc23
Yeti Rambler, Rubz Ball(best for foot sole massage)
scottmcdot
Herman Miller chair.
andrei_says_
Logitech lift vertical ergonomic mouse. Replaced the logo drivers with better mouse for macOS.
beretguy
ThinkPad wired keyboard so that I don’t have to move my arm away from home row (because it has track point).
runjake
Noise-cancelling ear devices. Bose QC 25 that take the (user-serviceable) AA batteries and AirPods Pro.
Crier1002
standing desk and a monitor for sure.
I_am_tiberius
- Kinesis Advantage 360 keyboard

- Logitech MX Ergo

- Laptop stand (Fatorm)