I've got it pared down to about as minimal as it can get. The problem that I have these days is that we have 2 cars, and both are fairly modern, so I've got the key to the Porsche which is moderately bulky, but not too bad.
And then I've also got the fob for the Outback which is bigger and more bulky.
So with those and the few other keys that I have, there's more stuff in my pocket than I care for. I used to have one of these

So I could only carry the half that I needed, but it added more bulk when I carried everything, and I found that most of the time I was carrying everything. So now I have just a split ring with keys.
__________________
Steve
'08 Boxster RS60 Spyder #0099/1960
- never named a car before, but this is Charlotte.
'88 targa

SOLD 2004 - gone but not forgotten