A lot of the things I use, I've settled on through a lot of iteration, and trial and error. Being a magpie and a hoarder is, perhaps, the worst combination of things to be, if what you like is having money.
Here is some of the stuff that I use on a regular basis. If you're looking for something from this genre of things, you could probably do worse than these things.
Keys are annoying. I spent a lot of time and effort trying to find some stuff that would make my keys annoy me less, and I've used this configuration for a while now so I think that means I succeeded.
And keys, obviously. I keep my car keys on the quick-release bit because once my dad said it's bad to hang too much from your key whilst it's in your ignition. That's some real Tandy-family generational info, just for you. Also means I don't carry my car keys if I'm not driving somewhere