At work, lately, self-defense-wise, I've been carrying a Kel-Tec P11 in a pocket and a spare mag in another.
In my other pockets, I carry a flashlight, two sets of keys as heavy as my gun, and a wallet thick enough to choke a hippopotamus. I carry a knife and scissors on my belt, and a cellphone on the other side of my belt.
I guess I have so much non-tactical stuff a spare mag has always seemed like a drop in the bucket.
On my own time, I still carry my airlite revolver with a speedloader in the same pocket. One set of house/car keys and my wallet. And I go barefoot whenever possible. I'm much more comfortable on the weekend.