User: Capt. Oblivious

Carabiners (minimalist approach)

On: How Do You Handle Your Keys?

I personally use a carabiner to clip to my belt loops. on that goes seperate keyrings with groups of keys.
i imagine a setup of the following for you;
one for the house keys, roof key, postbox.
one for your girlfriend's place keys.
one for the office and normal vehicle for commute.
one for other vehicles
Swiss Army knife
keep the rings as small as you can find them.
take only what you need, when you need it.