The first three are no brainers, the knife has resided in my pocket since about 6th grade. The other two not so much. An extra mag occasionally, if I feel the need I question why I'm going there in the first place. Yea, yea, I know about failure drills etc., over 3000 rounds without a failure, I'll risk it. Flashlight? I ain't no cop and if I need a light, well, again I'll risk it.
Full disclosure means the mag and light are in the car in my "purse". I rarely leave home without it, it's my truckin' supply bag, meds, light, multi tool, sunglasses, pens, logbook, couple of granola bars, Thermos coffee cup, Gold Bond powder, work gloves, teethbrush
, maps, you know all the stuff a modern man needs to survive!