Just supposing you locked yourself out of your car, or your home.
Do you have a plan for getting inside again?
(hopefully not a destructive plan)

Call the locksmith. :->

Call security forces, they have keys and slim jims

Keep a couple of extra keys on a neck strap, or in/on something you always keep in your pocket.

If you have a dog with a ruff, attach a door key to its collar, preferably between a couple of ID/rabies tags. And keep your mouth shut about it.

Sue

I use duct tape to attach a spare car key on the back of my license plate. it will NEVER come off unless specifically removed.

Spare car and home door keys in wallet and hidden outside in the yard. Also use combination locks where practical.

Trusted neighbors. We have a key to their house, they to ours. We have had to let each other in a couple of times. Good neighbors are a great resource.

License plates are stolen quite often so you just gave someone your key.

My truck: Spare Key in wallet and OnStar
DW's Jeep: It is a jeep. Soft Top, so unzip the top.
DS's car: Spare key in wallet.

House: Dog door. It is big enough for me to fit thru (at least for now anyway), and the GSD's keep everyone not a member of the family out.

The only way this happens is that the keys are locked in the truck -- BTDT. I take the spare key that's kept in my EDC Mission Wallet and open the door. Then I put the key back in the MC.