Pen, pocket journal, wallet, phone, and whichever pocket knife I grab that day.
I’m really a simple person, but I"m going to go into my favorite pocket knife and I’m angry that it’s not made anymore. The SOG Q2. It’s a “baton” shape" IE, slightly longer than a standard pen. Has a flashlight, bottle opener (with flatehead screwdriver, in other words beveled the bottle opener) and knife. The opening mechanism is such I’ve never had it accidentally come open on me, can be opened one handed, and to keep it from closing you’re literally holding the body that goes over the knife.
I’ll toss in as I have two, a set at home and at work.
For music, they’re honestly kinda meh. They’ll get the job done if you want some music but lets be frank you’ll find better sound quality headphones out there.
The reason I absolutely find them game changers is they allow me to wear them when I’m at work. I work on mechanical equipment in hospitals, so I need to hear what’s going on around me, one earbud can block up a side but this means I can hear when someone is talking to me. Also I found that earbuds didn’t fit me well so would potentially fall out, these wrap around the back of the head and stay in place, even when I’m working in some strange positions. And when I’m pulling out the power tools and things are going to be loud, I stick in earplugs, and I can hear what I’m listening to better even.
Phone work, I was shocked because my last job I was in a cargo van with minimal insulation so A LOT of road noise, but I’d hear the person I’m talking to with little issue and they could hear me well. Makes hands free phones a lot better.
I listen to podcasts, audiobooks, and the like. I mean chew through so many of them it’s not even funny. Because of that sometimes I found with the single earbud one you’d have something in stereo, well that single earbud messes it up and you gotta set it to a mono sound. These you’ve got that dynamic sound going.
So in short, if you’re going for audiophile level stuff, pass on these, but for daily drivers in day to day life they’re on the top ten things I’ve ever bought.