I managed to solve that problem with a key chain that is tightly attached to my pants and so hard to remove that I think twice before washing my pants. Almost ran out with the wrong pair of pants a few times, but hey, that's it. Only 1 lockout in 20 years.

But everything else should have a locate feature like your phone. Around the mid 80s, there was a short lived trend: A keychain that answers when you whistle a specific sequence to it. What happened with that?