Claude Code Pro ($200, but worth every penny), Tech Talks Weekly Plus, Pragmatic Engineer subscriptions.
Vertical ergonomic mouse (Logitech Lift in my case). My wrist pain disappeared within a few weeks after years of problems (knock on wood).
Kindle Paperwhite (used for < $100).
Drowsy silk sleep mask. It's truly a "buy it for life" item, and it's made a huge difference in my sleep quality.