Victorinox Deluxe Tinker
Perfect Swiss Army Knive for me - always lives in my pocket and gets used every day. Has a screwdriver instead of a corkscrew.
Rite in the Rain Pocket Pen
A tiiiiiiny pen, that you can turn into a full-size one. Writes anywhere, even upside down and underwater.
Muji A7 Double Ring Lined Notebook
A notebook that's smaller than my wallet, so it can fit in my jeans pocket.
Belkin AirTag Holder
The most compact, sturdy AirTag holder I've found.