I have credit card numbers and info written elsewhere.
When I am at a gas station, I make sure my handbag or wallet is inside the car before pumping gas. I had a friend forget her handbag at a gas station, when she left it on top of the pump while she was pumping. To me, that’s the stupidest move anyone could make. Of course I couldn’t tell her that. I just make sure I throw it into the car before pumping so it’s not an issue.
When I am in a restaurant or public place, I always glance at the seats and table, or behind me as I leave, to make sure I didn’t leave anything behind.