Gun, mags, knife, keys, wallet.
No light unless I am out at night. I keep a high lumens flash light in each car. Toss it in my pocket if I am out at night. My key chain has a screwdriver on it.
But I NEVER leave home without my knife. There are just too many uses for it. I don't carry a small pocket knife any more. I carry a CRKT. It is a little bigger than my old Buck Muskrat. I can't carry a weapon with my at work either. Funny though, nobody thinks about what I can do with a knife.
...Unless someone has a gun.