I used to get severe wrist ache by 3 PM every single day until I switched to this. The natural grip angle completely eliminated the tension in my forearm, and the battery literally lasts up to 70 days on a full charge. Easily the best upgrade you can...
MX Master 3s Wireless Mouse - 8K Optical Sensor
If you catch yourself slouching after an hour of sitting, this is a game-changer. It gently forces your back into proper posture, and the relief on your lower spine is immediate. It turns even the cheapest chair into a comfortable workstation.
Everlasting Comfort Original Lumbar Support Pillow
Switching to a compact keyboard instantly fixed my shoulder discomfort because my mouse isn't miles away anymore. The typing feel is super quiet, tactile, and easily the best I've ever used.