There are a lot of best practices to follow. Make sure you have labelled your cards. I also label the end of my cards with a different coloured dot so I know which card I have just inserted and which was was already in there.
If I’m managing card clips or formatting, I always eject everything other than the card Im fiddling with.
Glue the rubber boot into the P2 cards box and make sure that the cards are only ever in the box or the camera.
Always write protect the card once you remove it from the camera, esp if going to a computer.
Just some off the top of my head.
Regards,
Richard