One item related to the left/right that I worked out a solution for a few years after I started driving was when I referred to the right side of a vehicle or the left side, I had assumed it was universal that it was relative to the driver or passenger sides-- driver is left, passenger is right.

But then I'd mention, say, a tire that was chronically losing air to a mechanic, say it was the left rear, and he'd go over to the passenger side, since from the front of the car...

After that happened a few times, I started always saying "Driver's side (whatever)" or "Passenger side (whatever)".