Find My Phone
I recently found a handy Alexa skill. "Alexa find my phone" and it rings it - very handy. But setting it up was annoying. I had misplaced my phone, I had to tell it my phone number. But then it needed to send a verification text message to my phone - but I didn't know where it was! So I had to manually find it, which I eventually did. It's handy now.