A tiny 65W GaN (gallium nitride) USB charger. It is a fraction of the size of the MacBook's charger and can charge practically everything I own, even 2 or 3 (devices not laptops!) at a time.

Anker/Soundcore Motion+ bluetooth speaker, even though I use it at home as a soundbar for my computer. Sounds way better than others I have, like the much larger Sony SRS-XB43.

An actual linear tracking mouse and config. The ASUS/TUF M3 wired has the right size/symmetry for my hands. The config software can be used specifically for programming the DPIs and doesn't need to be installed.