When I was running the internal k8s clusters at a previous workplace, I simply got into the habit of compulsively running `kubectl config current-context` to check which one of the 50+ clusters I was currently connected to (designated test clusters for *playing with cluster infra", designated clusters for "devs playing around", designated prod clusters, with segregation between "batch-like" and "interactive" workloads, as we needed to treat the nodes differently in those, designated "run the CI/CD pipelines" clusters, as they needed different RBAC, ... and then duplicate between multiple data centres).