Minimum EDC:
wallet-cash, CCs, drivers license + department ID, dental flosser
bandanna, cellphone, pen
swiss army knife, chapstick, spare change=$1-2.00
firearm + reload + 4" folding knife (part of my uniform for 35 years, now.)
car + minimal necessity keys - two sets, one each front pocket.

Most days-in a bag-I add one or two 32 oz water bottles, flashlight, spare battery pack to recharge cellphone, raincoat, reading material, Powerbars (no affiliation), lollipops, small OC spray, 3*5 cards for paper, a short roll of toilet paper and a small teddy bear.

If you ever have to sit with a lost child while you try to locate their parents, "my old teddy bear," a lollipop, and a game of tic-tac-toe will make their time much easier to bear--no pun intended.