As we know that kubectl is a powerfull tool which we use every day. It has broad functionality.
Which kubectl tip or tricks, you found out and said wish I knew it before.
I will start with my experience wish I would have known earlier
If you want to check out the logs of the previously terminated container from pod POD_NAME.
You can use the following command with -p flag
kubectl logs POD_NAME -c CONTAINER_NAME -p
looking forward to seeing your tips and tricks