I've got a quicksilver key-chain (I'm 26) I work in a warehouse alone all day so no one really can say to me take those jingling keys off (hey at least I'm not wearing those jingle bells on a necklace.
Keys:
Tacky on the belt and tacky as a bulge in your pocket. Leave them elsewhere.
I need something like a thin leather strip with two loops at the end. No more than half an inch wide or so at least 4 inches long so it goes inside the pocket. This is the piece I can't find anywhere.
why not just use a pocket watch chain? Those look classy and understated and are built for the purpose.
I have house keys for a few houses; a garage lock key; a spark plug gapper; THREE keys to get into my apartment (one to get to the laundry room); mailbox key; SecurID; and a bottle opener on my key chain. With one of these things, I'd shove my two apartment keys (main door and my apartment) on one side, with the mailbox key for convenience; and everything else on the other side. I carry my car key on its own ring with the remote. Maybe keep my utilities on the get-back-into-house side.
I know, this would leave me going home to get keys to various peoples' houses, how sad. Or going to my apartment to get the laundry room key... maybe I'll shove that on this side too? But then I'd need the garage key, because why not.
In reality, the laundry room and garage AND mailbox are AT MY APARTMENT, I can leave those off (mailbox: you can pick this up on the way in).
....
I know, it's complex. It involves some thought, and compromises. But hell I dump the whole key chain in my car when I go out.
One option is to keep my keys in my messenger bag, but that's risky. Just last week, I accidentally left my bag at work.