As a simple soul with no wish to run the risk of trying to say too much via inked in and irremovable body art I might go for a more simple emergency type message like the one below, but in what actual location?
and don't bother
Then you get into the business of fonts, word layout, kerning, additional graphics and all the rest of it. No wonder most people need to be drunk and be in the middle of some life time crisis beforehand. Hmm, what about punctuation?