The sporran.

I've been told that I have entirely too much gear that I haul around on a day to day basis, and the fact that kilts have no pockets make wearing a sporran essential for me.

And if I've got my hose hiked up, something to go in the top of the right one. A sgian dubh under normal circumstances. I've got a bottle opener that comes along when a 3" fixed blade would be ill advised. The 2.5" folder tucked behind my belt is a different story entirely though...just like AmEx...don't leave home without it